4g64 w/ 4g63 head on truck

[nreid90]

ok so the truck is slow and wanna change that so ive been lookin online to see the options..

What i have now is a 1994 MM 4g64 and im putting the 1g 4g63 head on it. i have not gotten to far on the project just started this past weekend... problem #1, the cooing passage on the head is now on the back against the firewall. without cutting the firewall what can i do to try to get this to work and what other head mods am i goin to have to do to make it work on the 4g64 wideblock???