302
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Senior User
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From: Mt. View Hawaii
302
I would like to in the near future build up the 302 out of my mustang and put it in my truck because I ain't real impressed with the speed density fuel injection and want to run a carburetor. It is a 1972 302 and was looking at the summit racing street/strip intakes. I don't know if I want the stage 1 or 2 but I'm thinking one of them. If you remeber me I am cheap. I would like a cam with a lopey idle with lifter kit for less than $200. I'm thinking of doing a port and polish on the stock heads cause I can't afford performance ones. New rocker arms and valves and springs, again on the cheaper side. Possible distributer upgrade, most likely ignition upgrade. What size carb do I need. I'm thinking of leaving the bottom end the way it is. Stock pistons, crank, con rods, and heads. But I'm also looking at summits Sealed power engine rebuild kits, debating between cast and hypereutectic pistons. I am looking for power on a bugdet for in my truck, I don't do a whole lot of towing but some. any suggestions would be appreciated.
I would like this project to cost less than $1000
I would like this project to cost less than $1000
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Senior User
Joined: Sep 2006
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From: Mt. View Hawaii
I have a friend that I'm pretty sure I'm going to get a 351M off of him and was thinking of building that instead, same thoughts for the 351 though as far as intake and 4 barrel carb, ignition, and such. I don't know anything about 351's but I'm told that the 351M is more of a truck motor. I think its a late 70's ealry 80's. Anyone have power ratings on this motor?
Post Fiend
Joined: Sep 2006
Posts: 14,325
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From: Island Southeast Alaska
First off ya need to know that the 351/400m series engine will not fit where a 302 is. A 351 Windsor, 300 6 a clever and others will fit. The 300 I6 is the best low torque engine for towing.
Hotshot
Joined: May 2003
Posts: 11,141
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From: south louisiana
The 72 302 is a turd. It's got a retarded cam, Grand Canyon sized dishes in the pistons. You'd need to correct those two deficiencies for starters. Ditto for the 351M, it's also a turd, just a bigger, heavier one. Pistons are too tall, stroke is too short, cam is also retarded. It can be fixed, but it'll cost you. What year truck do you have now?
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Joined: Sep 2006
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From: Mt. View Hawaii
I have an 86 F250 with a fuel injected 302, I want a carb instead of FI. After talking to friends I decided to stick with the 302 so forget about the 351m for now.
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Hotshot
Joined: May 2003
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From: south louisiana
You can go with a 351W instead, that would be a bolt in, and a definate improvement over the 302.
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Senior User
Joined: Sep 2006
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From: Mt. View Hawaii
I already have the 302 and have a couple others sitting around for spare parts so I'll go with that. I'm going to build up the 302 anyways so I'll get the power I want.
Last edited by Lee250; Apr 29, 2007 at 05:51 PM.
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From: Mt. View Hawaii
If I run a big cam should I run the stock pistons because they have the valve reliefs in them. The kit from summit,the number above is wrong pt# FEM-MPH172-000, It says piston stlye is flat so I don't know if they have the valve reliefs or not.
Hotshot
Joined: May 2003
Posts: 11,141
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From: south louisiana
You want flat tops with reliefs. Most like this are good with most cams, not till you get into monster cams or heads with larger than 1.94 intake valves will you need something with bigger reliefs.