I just picked up a "400 c.i." small block from a local shop and I want to make sure it is what I paid for. I was told it was from a '70 Chevelle. How can I tell for sure what it is and what it came from? I got some of the casting numbers off the back of the block, they are, 330817. There are 2 freeze plugs on one side and 3 on the other IIRC (need to double check that but the engine is not in front of me right now.) Are there any other distinguishable marks on the 400 engines? I took the pan off and the heads will be off later this week but it looks like I did get the wiseco pistons he said were in there . The rockers are stock stamped style and the timing chain is a double roller, the cam is supposed to be a mild RV style and the springs are supposed to be good up to .510" lift. I'm also looking for some suggestions as to how I should build this thing. I'm either dumping it in my '83 S-10 or into my K5... not sure quite yet on how it would like the K5's TBI setup.