The engine is the original engine in a 1967 Ford F-100 pickup, this was the last year that I put the 352 in the pickup. In 68 they used the 360. As far as getting heads from Edelbrock I had called them around a year ago to ask this very question. I did call them back to be sure and they repeated the same answer as before. The mininum bore needed is 4.050 and mine is at 4.030 so they will not work. If I had known this I would have it bored to the another .020, but to late for that. Does any one know where I can get 352 HI-PO heads? Or would having my current heads ported be the same? Thanks for your help and suggestions!!!