Slant Six EFI....

George Jets said
Like your reworked exhaust manifold a lot. Along with your 2 1/2" out the back exhaust system you will be Golden !!!

I think it will run pretty strong. This is the engine with the head that was "accidentally" milled .155". Chambers went from 56cc to 34cc. lol It's right on top of 10:1 static. The big cam puts it at 7.9 dynamic. Pump gas friendly. lol