Help! I have a beautiful 1972 Buick Skylark with the 350ci & TH300 that I love but she ended up spinning a barring. I have her sitting at the mechanics right now to do a full rebuild when the shop calls and tells me this motor has already been rebuilt once before. So they will not rebuild it again because they are concerned with the walls being too weak. So I've been searching high and low for a 72' Buick 350 that will fit. I live in Houston and have literally called 40 different places. The closest thing I could find is a 1975 Buick 350 from a Century. My mechanic says this motor is not compatible. Why would the 75 Motor not fit into a 72 chassis? I have found at least 50 Chevy 350's but I've read that the conversion is not even worth the time (Not to mention I don't want chevy stuff in my Buick). So I'm at a loss what to do ... Does anybody know where I can get a running 350ci that will fit in my 72' Skylark? Or tell my if its possible to get a 75' engine in my 72? Thanks a bunch!