Thanks, I have put a lot of time and thought into every step, I'm about 2-1/2 years in now. For the motor mounts, I like the looks and price of the holley mounts for something off the shelf, for mine I had a shop laser cut some plates and got most of the parts to make 3 sets for about $50. Something like these
https://liquidironindustries.com/GM-...or-Mounts.html or the Car Shop ones
http://carshop.carshopinc.com/produc..._id/86960/2350 that a lot of people use would be a pretty good option too. I have mine documented in autocad, but with the header set-up, I'm not sure if they would work with different manifolds or headers.