Rain finally quite long enough that I was able to pull a valve cover today, big 360 cast in so I guess I know that I have a 360 headed 318, my truck is an early '85 so maybe it slipped through the cracks, but since the T in the vin says 318-2bbl, most likely someone switched engines somewhere along the line. 1985 was after all more than a few years ago Anyway, I know what I have now, doesn't matter if it was factory or not, it's an old truck and I know what I have to work with, know I just have to free up the exhaust and fix the sloppy steering and I'll be good to go. Thanks all!!!!