Hello there. I have a Buick 455 complete except for starter, and it needs a carb rebuild other than that I was told it ran fine. It came out of a 72 electra 225 I was told and it had about 72,000 miles on it. I have never heard the engine run or even made an attempt to start it. I too was going to put it in a 72 skylark but have since decided not to. I live in upstate ny an if u r intereseted drop me a line on here or u can reach me at (315)874-4058 ask for Chris. Thanx