I thought the Goodwrench 350 had the Vortec heads. But I was looking at sdpc.com and they indicated that they were not Vortec heads. I thought the old Goodwrench 350 were not Vortec, but all the new ones were made using Vortecs. Anyone know? And what's the deal with the oil dipstick? In another post it indicated that it can use a left or a right dipstick, which means you have to use a GM gasket. I like the one-piece oilpain gaskets and don;t want to HAVE to buy parts at the dealer. Is there anything else about this engine that's not immediately apparent? My plan is to run my current 350 into the ground then buy a Goodwrench, but I don't like suprises.