I have no clue on the motor. The guy said the owner before him drag raced the truck some, rebuilt the motor and he had the truck sit. The guy bought it, put it back on the street with 2 bbl carb, stock intake manifold, etc. I put a new intake manifold on it, new 500cfm performer series carb on it, etc and changed new gaskets on manifold and valve covers, etc of course and now I don't gear the cam so much, it's pretty quite now but you can still hear it some and it still rocks pretty good. The headers I am sure have leaks too because they are old crappy looking so that will make it sound more rumbly in a way too (hard to explain the sound). But yeah I think I may stay with this motor and do a rebuild later on. The guy I bought it from said he has had it for about 5 years and he never drives it much, just once in a while (1 time every two weeks sometimes more but not far at all) and said that it should last a TON more miles. I bought it from my old metals manufactoring teacher and I can trust him, it's just he doesn't know much about motors, he said it's been all rebuilt and that's all he knows but the pistons and cam are not stock. I am going to build me that compression test thing that Denny sent me the plans for and see if there are any leaks (leak down test I meant) and see how well they are holding. I am thinking that it's burning a little oil because every 3 weeks or so I am a quart low and I don't leak much oil at all, probably 2 tiny drops of oil on the driveway when I park it and that's it.

I just wanted to know basically if going to 347 is pushing the wall thickness a little too much on a 302 LTD block. Also, any idea if these LTD blocks are any good. My father said he would think that it's good because LTD's were pretty big heavy family cars and they would need a strong block. I have that book here and they have a huge list of different places to buy the 347 kits from and tell the pros and cons of each ones, which ones to use if you run nitrous or a blower, etc but they all run 2000-2500 and I have seen them for 1000 and I think Dave or someone on here told me a guy on Ebay sells them for 800 bucks.

Not sure but I am still looking for more info so keep it comming if possible and I appreciate all the help and time you guys are taking to help me out here. So far today and yesterday I just learned quite a ton of stuff about building top ends because I screwed up a couple times but nothing that can't be fixed with a little time, money and elbow grease (or hair grease if ya got some).