Anybody here build up a truck 400 engine?
I've had my truck 11 years, and I really only don't drive it much because of a lack of a/c, hard starts, and really really bad gas mileage (10-11 mpg). I figured with my Mustang almost done, I'll soon start working on the truck some more. Number one priority is an aftermarket a/c kit. I've been saying that for years, but this is the year. Next priority will be engine work. How much engine work remains to be seen, but I'm feeling out my options.
I have a 351M in my 78 F-150. A few months back I bought headers and dual exhaust from Alex for it, and we discussed an alum intake and Holley 4-v for it.
However, I'm thinking that may not be enough. I'm now thinking of either gutting the block and putting in a 400 crank and pistons and changing the cam too, or picking up a 400 off Craigslist and doing a complete rebuild.
From what I've read, the 351M/400 had very low compression ratios, and I can get a big boost by using some pop-up pistons and/or closed chamber 351C or aussie heads. I'm trying to track down what's available in aftermarket alum heads.
So I'm looking for suggestions for heads and cam. I do plan on buying from Alex when the time comes, but not sure about time frame so I don't want to burden him with tire kicking right now.
Goal is to take advantage of the 400 cubic inches and letting it breath, while also having a good reliable street/towing/hauling truck.
Transmission was recently rebuilt with a towing shift kit, transfer case rebuilt at same time, and rear end rebuilt some time ago but still solid.