Just picked up a new toy/project, 1969 Fastback that is a Mach 1 clone. The guy I bought it from said he had a 351W Ford Racing crate engine put in it, but his ex threw out all the paperwork and receipts of the work that was done. The engine was installed about 10 years ago. The heads appear to be aluminum and have SVO stenciled into them. I pulled the valve cover off, and found out it has the M-6049-X302 heads on it. It also has the MSD distributor. The guy said it was a 351, but I'm beginning to wonder if it's a 302. Any ideas? Does someone have a FRPP catalog from 2004 or 2005? The 2006 catalog has X303 heads in it.