Will early style 12a END/MID plates fit onto GSL-SE rotor housings to make a 4-port motor? They have already been street ported, will that make any differance?
Thanks,
Chris Stahlman

 

Have you done a search? I know there is a year you can do it, not sure of a 79 though....

 

yes it will fit. but I prefer to use 79-83. gas nitrated and taller ports than the 84-85. thats what I have. GSL-SE converted to 4port.

 

84/85 doesn't have gas nitrate coating on it? Is there any way to add it?

Doesn't it get removed after lapping for a rebuild anyhow? Can it be readded?

 

i just realized that he mentioned a 79. BTW, the rear plate is not tapped for oil pressure. So its either you buy a block plate (it goes between the block and oil filter) OR just tap a fitting in the rear banjo bolt. sorry about that.

anywyas, as far as I know, beginning in 79, all plates are gas nitrated (gray dull finished). Im not sure if they can be re-gas nitrated.

 

If you retain the GSL-SE center plate, you could retain EFI if you wanted. (fuel injectors go into the center plate)