need info on 1971 motorand frame mounts?

[james69z28]

All good info, esp. On the big block mounts, i thought that might be the case. I redrilled 3 holes in the frame on both sides and bolted the frame mounts 1 1/4" further back., i did remove the driveshaft i had built 2 weeks ago and had it shortened 1 1/2". Been waiting on headers 2 months now-so no exhaust involved!

Now the only problem is i am looking for some custom billet upper radiator mounts to hold the entropy radiator tighter to the core support, i removed the original lower mounts and installed 2 new ones, mounted to the widest position, for a 4 core radiator but when i tried to use the upper new ones for a 4 core it holds the radiator out over 1 " away from the core support --towards the engine. I do not know why because it sits tight to the core support on the bottom? So if i need to get someone to build some, i will. i have seen some nice polished billet ones, just dont know who makes them?