None period. I can fit about a piece of cardboard between them. And the trans was already in the car so i can only get 4 transmission bolts in since there is no room. Once its running ( or if it runs) my buddy is gonna help me get that 5th bolt in. Also the factory th350 dipstick wouldn't fit so i ended up using a lokar flex dipstick to move it.How much clearance do you have between the heads and firewall?
I think if i do another gbody LS swap im gonna use 1/2 inch back plates instead of 1 inch for more clearance but i wanted to keep stock location of the cross member and drive shaft length that's why im using 1 inch.