im not a mechanic by any means. I can do basic stuff like brakes, radiator change, small jobs etc. I bought the JTR book, bought the GM mounts it said to buy, and did what the book said to and my 350 its sitting nice and cozy in my 260z. Took a lot of trial and error, but mostly due to not hammering the transmission tunnel enough to make room for my tranny. Mounting the motor mounts to the block with the JTR stuff was one of the easiest steps i have had since i started my swap. If i were any good and electrical and made of money to buy more stuff to finish it, I would be on the road already, lol.
Good luck with your swap man.