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Thanks guys, I learn something new everyday. Why is it that there are no real parts supplies(aftermarket) for these engines or is it you just have to look harder.
There are some decent aftermarket parts for the 351M/400 but certainly nowhere close to the 302/351W family. It is easy finding intake manifolds, headers, carbs, valve train parts and it seems that Edelbrock is getting closer to offering heads for the 351M/400. Having said that, it is easy to get great torque from these engines with what is available now.
my 78 has a 351m in it. when i bought it last march, it already had a Holley 4 barrel carb and headers. i dont know if theres anything that was done internally, but it still feels gutless.
I have had a 79 Bronc with a 400, which sucks buttocks in ALL areas of consideration. I put a 460 in it and I LOVED it. The gas mileage was actually better, although just slightly. I now have another 79 which just spun a bearing...sound familiar to anyone out there? I found a 460 and am planning to slap that bad boy in after I rebuild it. Oh I have a C-6 and like my first swap I'll throw on some L and L fender well headers. You can get all of your parts at Jeff's Bronco graveyard a proud sponsor of this site!! I to am just waiting for the cash...maybe I'll win the lottery and get it done quick...of course I'd guess I should maybe buy a ticket huh? Good luck and remember, have fun doing it. If it gets to be a must be done and lots of pressure it sure takes all the fun out of it.