So we purchased a 1975 mustang II Mach 1 (I know it’s not a Mav or a comet) with a hot 289, c4 trans, and narrowed built 8 inch rear end. Pulled the motor to freshen it up (leaking bad from sitting). All the ears of the 1965 289 block were either cracked or broken off. So we need to build a new motor. The build is a super low budget build because the car will need a few more things. I picked up a super low mileage short block out of a 1992 mustang 5.0 roller motor with stock forged internals. The bearings look great and I’m considering just rehoning and ringing the block and that’s it. I have a free set of explorer GT40 heads off a scrapper that I’m going to bench port, and I’m thinking about using the intake and carb setup off of the old motor, which is a Eldelbrock 289 performer intake and Edelbrock 600cfm carb. With this being my first build, I don’t know what roller cam to choose and what head gaskets to go with for potential spray down the road. Any advice would be greatly appreciated.