Have some engine swap ?'s...
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New User
Joined: Jul 2004
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From: Roseville, CA
Have some engine swap ?'s...
Putting a late model 302 (5.0 shortblock) into a '68 f-100. it's 2 wheel drive and has a 4 speed manual. I have a few questions:
1. '68 never had a 302 option according to the parts store. Can I just use '69 motor mounts for a 302 or do I have to do something different?
2. What do I need to do about the bellhousing? The truck currently has a straight six and it looks like the bellhousing is going to be way short for a 302. It also looks like the current 6-cylinder bellhousing has the mount for the clutch arm in it. I am going to use the 5.0 flywheel for balance reasons.
3. What starter should I use?
any help is greatly appreciated. Thanks
Eric
1. '68 never had a 302 option according to the parts store. Can I just use '69 motor mounts for a 302 or do I have to do something different?
2. What do I need to do about the bellhousing? The truck currently has a straight six and it looks like the bellhousing is going to be way short for a 302. It also looks like the current 6-cylinder bellhousing has the mount for the clutch arm in it. I am going to use the 5.0 flywheel for balance reasons.
3. What starter should I use?
any help is greatly appreciated. Thanks
Eric
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Joined: May 2004
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From: spanaway wa.
I had a 300 straight six in my 68 f-100 shortbed 3-speed. I put a 302 from a 1971 ford torino in it. As i recall i used the same motor mounts. everything bolted right up. Used the same starter that was in my truck already.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
Eric, Your engine will bolt to your tranny. You will have to get the proper flywheel if your donor was an automatic. The two bolt starter from the 6 will work in your 8. Maybe before you build the engine you might do a dry fit to see if the mounts will work. The 302/351W use a different perch, but yours might work, with the tranny in the same position.
The 302 will want a different radiator, I think. You might want to look at a late model cross flow.
John
The 302 will want a different radiator, I think. You might want to look at a late model cross flow.
John
Tuned
Joined: Dec 2004
Posts: 340
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From: Rock Hill, SC
You can take your I6 radiator if the tanks are good and have a 3 row core put in it. The tanks are the same on 6 and 8 cyl, but the 6 has only 2 rows. I used the mounts off a 70 F100 and it worked fine. If you find a flywheel make sure it's an 11". I brought one home once from a car and it wouldn't work with the larger bellhousing. The 6cyl flywheel will bolt to the 302 buy the balance is way off. The other trouble I had is the distance between the radiator and the fan. I ended up using an electric fan set up. The carb linkage will be on the wrong side also. I modified mine by using a heavier rod and putting an S bend to bring over to the drivers side. You might keep an eye out for the linkage if you get a donor truck for the mounts.
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New User
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From: Roseville, CA
What i'm worried about is the flywheel/starter combo. The truck I-6 flywheel is probably larger than the 5.0 flywheel. I want to stay with the 5.0 flywheel because of the balance, but I think it is smaller and might not work with the starter thats already there. Also, it sounds like i need to get v-8 engine pedestals to replace the i-6 ones to line the thing up correctly. Is that true? Thanks
Eric
Eric
Fleet Owner
Joined: Jun 1999
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From: Creedmoor, North Carolina
Eric, Ford used a 2 bolt starter and a 3 bolt starter. The 2 bolt starter is used in both the I6 and the 302.
Automatica use flexplates and st. drives flywheels. If the 302 had a flywheel you are OK, if it ran an automatic you need to get the proper flywheel for your engine.
Comprenda????
John
Automatica use flexplates and st. drives flywheels. If the 302 had a flywheel you are OK, if it ran an automatic you need to get the proper flywheel for your engine.
Comprenda????
John
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Tuned
Joined: Dec 2004
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From: Rock Hill, SC
If the 302 came out of a car it is most likely a 10-1/2" flywheel where as the truck bell housing is most likely an 11". If you use a 10-1/2" flywheel in a bell housing for an 11" the starter won't engage the flywheel. It will be to far away. I have already encountered this problem on an engine swap from a 240 I6 to a 302.
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Joined: Apr 2003
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From: Cary, NC
Not trying to high jack this thread but, I want to do basically the same except replace the 3 spd manual with an automatic.
I have seen C-4 trannies advertise as having a small or large bell housing. Which one would be right for a 302?
Thanks,
Mike
I have seen C-4 trannies advertise as having a small or large bell housing. Which one would be right for a 302?
Thanks,
Mike
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From: Roseville, CA
jowilker,
I understand the difference between stick and auto. The issue I was trying to address was the one answered by red69.
Red69,
The flywheel dia is 13" something... where the clutch disc diameter is 10 1/2". What did you end up doing about the flywheel/bellhousing problem? I guess you could possibly rebalance the i-6 flywheel or get the right sized 302 flywheel (off a truck I assume) and have it rebalanced to the 5.0L 50 oz. imbalance...
Thanks
Eric
I understand the difference between stick and auto. The issue I was trying to address was the one answered by red69.
Red69,
The flywheel dia is 13" something... where the clutch disc diameter is 10 1/2". What did you end up doing about the flywheel/bellhousing problem? I guess you could possibly rebalance the i-6 flywheel or get the right sized 302 flywheel (off a truck I assume) and have it rebalanced to the 5.0L 50 oz. imbalance...
Thanks
Eric
Tuned
Joined: Dec 2004
Posts: 340
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From: Rock Hill, SC
Get the right one off a small block truck. The 302 flywheel has a big weight cast in it. The I6 doesn't because it is internally balaced. The weight difference I think is about 28 ounces so I doubt you can bring the I6 flywheel into balance with the small block.
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From: Roseville, CA
Originally Posted by Red69
Get the right one off a small block truck. The 302 flywheel has a big weight cast in it. The I6 doesn't because it is internally balaced. The weight difference I think is about 28 ounces so I doubt you can bring the I6 flywheel into balance with the small block.
Tuned
Joined: Dec 2004
Posts: 340
Likes: 8
From: Rock Hill, SC
I forgot about the newer 5.0 having a heavier balance weight. Can you find a donor truck that is a later model and came with a 5.0 manual? I am not sure even then that the flywheel size is the same. It would take some measuring to be sure.
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New User
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From: Roseville, CA
Originally Posted by Red69
I forgot about the newer 5.0 having a heavier balance weight. Can you find a donor truck that is a later model and came with a 5.0 manual? I am not sure even then that the flywheel size is the same. It would take some measuring to be sure.
Thanks
Eric
Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
Originally Posted by ekoster
jowilker,
I understand the difference between stick and auto. The issue I was trying to address was the one answered by red69.
Red69,
The flywheel dia is 13" something... where the clutch disc diameter is 10 1/2". What did you end up doing about the flywheel/bellhousing problem? I guess you could possibly rebalance the i-6 flywheel or get the right sized 302 flywheel (off a truck I assume) and have it rebalanced to the 5.0L 50 oz. imbalance...
Thanks
Eric
I understand the difference between stick and auto. The issue I was trying to address was the one answered by red69.
Red69,
The flywheel dia is 13" something... where the clutch disc diameter is 10 1/2". What did you end up doing about the flywheel/bellhousing problem? I guess you could possibly rebalance the i-6 flywheel or get the right sized 302 flywheel (off a truck I assume) and have it rebalanced to the 5.0L 50 oz. imbalance...
Thanks
Eric
Hi Eric, Me thinks you boys are mixin your apples and oranges here. The blocks are cast at the foundry with no concern if they will be used as an automatic or st. drv. The starter mounts are cast on the block and can't be moved. I I-6 and 302/5.0 both use the same two bolt starter, and small block bell bolt pattern for tranny use. Ford uses weights on the flywheel/flexplate to balance the crankshaft, and can not be swapped between engines.
You can find different size wheels on the end of the engine, but they are specific to that engine, and can't be swapped between.
Ford used a three bolt starter on the FE series engine and that one can't be used on anything else. ASAIK
Hope I made myself more clear
John