Not for the Mustang II they aren't. Those aren't reproduced and as far as I know never have been. Motor mounts and oil pan are very specific to the Mustang II since Ford crammed the 302 in there after the car was already engineered without a v8 available. Motor mounts and oil pan will have to be sourced used unless you can find some NOS ones. I believe the earlier 1975 motor mounts have smaller bolt holes than the later 1976-78 ones. No big deal though since you can simply drill the holes bigger to accommodate the larger bolts.Motor mounts should be readily available from your local parts store. Pan, I'm not so sure about. Pretty sure it's not front sump, with the rack and pinion setup, but I have never actually tried to find a pan for a Mustang II. And manifolds? Well, most of the factory log manifolds will work fine. Due to the tight space, you're a bit limited. If you found a set of used Shelby "K" code 289 headers, or early 351W cast iron manifolds, those would work even better. Clearance, as you know, is pretty tight!