Just blew my 12a last Friday.

What is involved in dropping in a 13b ? ie; clutch,exhaust,transmission etc...

Thanks for any input.

 

Well to keep it smog legal you would have to run everything that the 13b has on it. Meaning complete fuel injection system including harness and computer to control. You could of course
have a nikiki carb from a 12a modified to run the higher displacement of the 13b but would have to come up with a manifold to run it. Which means for the 6 port 13b's some fabrication.
Using a stock 13b manifold with very little modification to the stock exhaust. As far as the
transmission goes or the clutch goes you do not have to modify anything. If i remember you stated you have a 83 which already has the larger clutch so the only thing you would have to change is the flywheel and either run a stock 13b flywheel or lightened steel flywheel.

 

need 13B exhaust manifold or header

i think the 1983 to 85 clutches fit the 13BE flywheels, but you'll have to double-check that with a search (it's been a while ... sue me! )

transmission bolts up fine

need to change mounting bracket (or if your 13B is 1986+, then you'll need to swap front covers)

that should get the engine into the car. you'll have to decide how you want to get it running - carbie or EFI.