Thunder, No, and No again. The kit from your link is intended to rebuild the mid 70s truck 390. That means that you'll get 381Ps for pistons, or something like it. I recognize the kit. The pistons will give you LESS THAN 8 to 1 compression. Parts wholesalers have THOUSANDS of these worthless ultra low compression slugs laying around, and will almost give them to you to get rid of them. They aren't worth useing even if you get them for free. Not in a truck, and certainly not in a car. And then there is the thrust flange issue, the kits almost always the wider flanged thrust bearings, which won't fit your early block, at least not without some block work.

The MadDog kit might have better pistons, but you still have to machine the block to fit the wider thrust bearings. When you are searching out kits, get them to tell you exactly what part number pistons you are going to be recieving, and what brand of pistons are they. Engines without enough compression lack power and use excess fuel. You certainly don't want to build in a problem, do you ? DinosaurFan, at home as himself