The guy I'm doing this for has a gazillion vehicles on his farm. He's got an 89 3/4 ton van with a 360 roller motor in it. It sat for years, but, I had it running a couple of years ago. Sounded great, but, then something went belly up in the injection system. I think with a Hughes Whiplash cam, aftermarket intake, headers, converter and gears, it would make him a happy camper. I haven't checked, but, I'm thinking this engine should have 308 heads on it.