sen2two

So as far as water jackets go, can you use any of them? Or anything pre 86 will work?

j9fd3s

there are a couple extra o rings you need, but its basically just a 12a

sen2two

cool. I am going to build my twin dizzy 12a for a full PP. But I will use a 1st gen rear iron.



I'm pretty sure the apex seals will be fine, corner seals too. But i am unsure of the side seals. I am guessing I could use a regular outer side seal from a newer 12a, but what about the inner side seal?

j9fd3s

mazda usa chose to supply the same side seal part number for ALL of the pre 86 engines with the 1011-23-151 part. which is the longer of the dual side seals. there is a side seal for the 74-85 engines, 8871-23-151, but its a competition part in the USA



so basically that's why when you order the 1011 seals for your normal 12A they are way too long

sen2two

If i get the 1011-23-151 side seal, would i even need the shorter, inner seal?



If i make it a tight .001-.002 clearance, I probly would be good without the inner seal. Unless it serves another purpose i am not aware of?