i have the racing beat 13b 4port bridge port templates and pineapple racing med. sterrt port for 13b-rew. and also the race port exhaust port from racing beat.



can i use these on my 12a??? (1980)

 

yeah man i dont see why not

 

The -REW side housings have different port placement than '74-85 side housings which were more or less the same 12A/13B.



The port timing might get you there okay since all of the major dimensions are the same all the way back to 1967 (the Chevy V8 has been redesigned three or four times since then...) but you'll have to watch for changes in the runners and adapt as necessary.

 

when i place the 13b template over the ports they dont even seem that much more agressive.

(it already has a slight street port)