cthor

I recently bought a 72 240z with an SBC 350 in there. I am about to embark on a journey for power and have decided on going with a turbo setup on a 5.3 Lm7. I know I can buy LS1 mounts and put them on the 5.3 but, is there any way to make the 5.3 mount up to the 350 mounts on the stock crossmember? Or is my only option for the 5.3 to swap it to 5.7 mounts and then buy the conversion mount? if my research is correct, the 5.3 and 5.7 have different mounts but are interchangeable.