would 12a irons work in place of 13b irons??? just curious because i can get 13b hosings in good shape for cheap and could just use my 12a irons and get 13b rotors.

 

Yes, you can use 74-85 12a irons with 74-85 13b rotor housings.

 

Only if they are GSLSE housings or other pre 86 13B. 2nd gen and later housings have the water o-ring groves in the irons while all pre 86 have water o-rings grooves in the rotor housings.

 

thanks guys yeah the ones i was looking at were 86 so no go just looking at rebuild options i have a SP 12a i havent cracked open yet but the guy had it at the track and i fear for the housings with the 12a's reputaion for flaking, would like to a get a 13b or 13b hosuings for their better housing design