Engine swap
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Joined: Sep 2006
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From: Mt. View Hawaii
Engine swap
I want to build another motor for my truck and I have 2 choices. 1 a 302 out of a 72 mustang. 2 a 351m I am pretty sure I will get. Either way it is going to get rebuilt. Intake, 4 barrel carb, big cam, new valves, springs, rocker arms, port and polish the heads. Which motor should I go for?
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Joined: Mar 2005
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From: western montana
any kind of truck and either alternative is better than the 302. But with the 351m you get a 400 crank for somewhat cheap and then you have 60% more engine than the 302 and if it's a heavy truck you will get similar mileage or better. I just picked up a bronco where the guy said it was a 351m but it was the 400. the valve cover should have a sticker on it that says 351m/400 then the next line it states which it is.
A lot of info available here on 400 builds.
A lot of info available here on 400 builds.
I'll have the Roast Duck
Joined: Jul 2002
Posts: 9,622
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From: Northshore, MN
I just picked up a bronco where the guy said it was a 351m but it was the 400
I'd consider what tranny you have first. A 2wd would be better suited w/ 302 and something like 3.25 gears. A 4x4 or a 2wd used to haul/tow heavy loads would be better suited w/400 and 3.50 or steeper gears. Since yer tearing apart the 351M anyway, making it a 400 would be yer best bet. IMO.
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Joined: Sep 2006
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From: Mt. View Hawaii
I,ve decided for now to stick with the 302. I have a 1986 2 wheel drive F250. It has the fuel injected motor and I want to build up the other 302 with a carb. I don't like the fuel injection, it has to many problems and I want the carb. I use the truck for daily driving and maybe once every 2 months or so tow a car but it,s mostly a daily driver
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jmcgee
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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