I need to pick up a new heater core for my 77' with A/C. I have been hearing horror stories with the replacement cores. Not fitting right with tubes not lining up, all kinds of problems. Most of the vendors sell them for $80.00, but Wilcox has it for $126.00. Is there any differences between the $80 core or the $126 dollar one... I don't mind spending a few bucks more to get the right one. Does anyone have any suggestions on where to get a heater core, that's fits right.

I bought mine from Mid America and it fit perfectly. Mine was with AC also. I paid about $100.00. I read a lot of bad reviews about fit up when buying from the local part stores.  I agree on not going with the cheapest, this is not a job you want to do twice!!  Good luck!

i ordered one thru my local parts store I was surprised that I could still get it, but it is identical to the one that was in it.  I don't have AC   I have found that many of the parts can be order through my local parts store and most of them are ac delco, and sure are cheaper than the corvette dealers.  Comes in handy when you live in northern saskatchewan