K-frame engine Cradle/Jig

I've started to build a K-frame/engine cradle for my early A-body so I can install the 340, tranny, headers, k-frame, and disc brakes and other suspension components all at once. This would be done by raising the front end with an engine hoist and lowering the body onto the craddle. Zap in four k-frame bolts and then 4 tranny mount bolts an I'm done. Would totally avoid scratching the new paint and all the problems with the tti headers for the early-a-body.

Has anyone on this forum built one of these before and used it? I found a few photos from some resto shops to get an idea of how to do it. Any pictures, advice or comments would be great. Thanks in advance.

-Dave

Photos of what I'm talking about