No specific motor mounts.... you need to change the K-member...I think AJE or PA makes K-member for those crazies that want to swap a Chebby motor into a Mustang......then u just use regular SBC motor mounts....
Unless you're doing a LS1 swap or have a built, ready to go 350 SBC why are you doing this? Just curious, I'm one of those ppl who actually likes it when ppl go frankenstein on cars. Winds up being pretty cool/interesting sometimes.