New Here, Researching A Body Convertible 392 Swaps

Welcome to the madness! You don't have to use the 73 up K member. Conversion mounts are available for the 67-72 K. However, the brakes and big ball joints are an advantage on the 73 up cars. Holley has mounts that move the engine ahead in order for the SRV motor on the back of the intake manifold to clear the firewall. Their trans mount would be a must use as well. If you're looking for a TRUE bolt in trans options, then factory stuff it is. Either a Torqueflite or A-833. Anything that bolts to the back of a small block will bolt to the Hemi. You will need different exhaust manifolds as well. There are lots of build threads to check out. Good luck!