[engineer_gregh]

I had my 402 rebuilt a couple of years ago and it was expensive. Machine shop costs are crazy high. I've often wondered if I wouldn't have been better off buying a crate big block myself. I went with headers and they sound great but if I had it to go over again I would have stuck with the stock manifolds. Does your truck have stock A/C? I believe that makes a difference in long vs short water pump and which valve covers you can use if you stay with the A6 compressor. Does the crate motor have the alternator on the drivers or passenger side of the block? I would think Summit or Jegs can answer a lot of these type questions. There are several board members here running 572's and so forth that are a wealth of information. Good luck and please keep us posted on the direction you take.