Originally Posted by
IMSHAKN
ALL mach's came with a Aluminum block, that I'm certain of as I was ordering them when I was working at the dealer when they first came out. The "rare" is the R in the VIN of every single Mach 1 that designates that it is a Mach 1. The only major difference between the two years of the car are the emissions control setup, where the 04 varies just a little bit. Other than that all manuals came with an 8-bolt forged crankshaft, while autos came with a 6-bolt the cast.
There were no cast iron blocks put into these cars to my knowledge.