300 to v8?
Thread Starter
|
New User
Joined: Jun 2003
Posts: 7
Likes: 0
From: ERIE PA
300 to v8?
i found a 91 f150 regcab shortbed 2wd with a 300 l6 and a manual tranny. what i want is a street truck for cruising. the price is VERY right and it is in excellent condition
question is, can i swap out the 6 for a 351w (carbed) i understand the tranny will bolt up, what about motor mounts?
i want the swap b/c a v8 is simply more classic street rod than a 6 is.
question is, can i swap out the 6 for a 351w (carbed) i understand the tranny will bolt up, what about motor mounts?
i want the swap b/c a v8 is simply more classic street rod than a 6 is.
Senior User
Joined: Jul 2003
Posts: 318
Likes: 0
From: North of Toronto, Ontario
300 to v8?
Yes you can put a carbed intake on the efi 6. But don't you want a V8? First pull the 6 out. You will see where the 6 motor mounts are rivited to the frame. These must be cut out, or the 8 won't work, as the right mount is in the way of the 8's oil filter. Next, find some 8 mounts, and cut them out of the truck. Bolt them in your truck (the holes are already there). Now drop in your 351.
Posting Guru
Joined: Apr 2000
Posts: 1,069
Likes: 1
300 to v8?
It isn't hard, but it isn't easy!!!.
There are a lot of things to do. Not just swap mounts and "drop in the 351".
You will have to change exhaust system, lengthen some lines, shorten others. Radiator won't cool a 351, plus the outlets are on wrong side.
You have to modify the throttle linkage, fuel lines, etc. youalso will have to make sure that your state will allow the swap due to pollution laws.
I really think you should search the archives to read about this swap first. There are lots of posts about it.
Lastly, if you really want a street runner, for all the effort, I would go to a stock 460.
L&L Products offers a great swap kit for this setup.
Of course I always also try to persuade swappers to keep the six!!.
There are a lot of things to do. Not just swap mounts and "drop in the 351".
You will have to change exhaust system, lengthen some lines, shorten others. Radiator won't cool a 351, plus the outlets are on wrong side.
You have to modify the throttle linkage, fuel lines, etc. youalso will have to make sure that your state will allow the swap due to pollution laws.
I really think you should search the archives to read about this swap first. There are lots of posts about it.
Lastly, if you really want a street runner, for all the effort, I would go to a stock 460.
L&L Products offers a great swap kit for this setup.
Of course I always also try to persuade swappers to keep the six!!.
Trending Topics
Postmaster
Joined: May 2002
Posts: 3,241
Likes: 3
From: Broken Arrow, OK
300 to v8?
Considering what can be done with a 4.9 I don't think the swap would be worth it unless you went with a 460, and then you're really into some bucks.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Senior User
Joined: Jul 2003
Posts: 318
Likes: 0
From: North of Toronto, Ontario
300 to v8?
There's some good advice, but i agree that for a street rod, a 6 doesn't sound like an 8. If you're set on the 8, there are some more things to do than just droping it in like i said above. With the 91, you will need to remove the in tank fuel pump, or get a pressure regulator (for a carb). The fuel line can be spliced into on the frame rail. The rad needs to be changed b/c the outlets are reversed for an 8 and a 6. The throttle cable must be changed (same hook-up on the pedal). You need to change your ignition system to work with your new carb'ed set up (new ignition box, new distributor, modified wiring harness etc. etc. ) I did the opposite project to my 91. EFI V8 out, Carb'ed 6 in. It can be done. Motor out and in isn't hard. Just a lot of details.
Senior User
Joined: Jun 2003
Posts: 188
Likes: 0
From: Wesley Chapel, FLA
300 to v8?
Keep your 6. The first classic hotrods were almost all sixes. The first Corvettes were sixes. Go to www.fordsix.com and see everything that can be done. I souped up my 300-6 ten years ago or so and I still love the way it runs and sounds. The difference in performance is almost unreal. It was like a completely different vehicle when I got done. I don't get single digit mileage either. And if the hood is open people can't believe their eyes, whereas who cares about another V8. By switching engines you are opening a big can of worms, that's why I didn't do it. If you want a V8 truck buy one. Much, much easier.
Thread Starter
|
New User
Joined: Jun 2003
Posts: 7
Likes: 0
From: ERIE PA
300 to v8?
well i already have a v8 4x4. it is a 91 351 and i thought that if i was starting a project then it would be good to stick with an engine that i am familiar with. thanks for the link. i am getting interested in this 300 thing
