Welcome to the stampede! The frame mounts I used on my LS3 swap are a package deal from BMR that have the engine mounts and the frame mounts together. They work well for me. Good Luck with your build!
72 camaro, cammed LS3, 2004R, 3.42 10 bolt. My newschool72 !
68 camaro, 406, th350, 4.10s. Old schoolin hotrod. 11.30 at 120 on dragrads, pumpgas, footbraken.
05 GTO the modern goat! All stock internals .13.4 at 109 on street tires, burnin tires in first and second.