Will the big cap distributor fit under the tpi distributor cover? Thanks

 

Why wouldn't it? 85-86 F-bodys used a large cap distributor, so did the Corvette. The only time it's a problem is with the giant Accel Super Coil that covers the top of the cap, which is why Accel offered a stubby filler to replace the cover.

 

You have to make a couple of tweaks in the calibration that account for the size of the cap and it's effect on the ignition timing. The tangential speed of the rotor is a little faster on the larger diameter cap. It's basically a copy and paste from the Corvette calibration.

 

If you didn’t get one with the swap parts you purchased. RockAuto has them lookup a 85-91 corvette 5.7L.
Just make sure it’s computer controlled and has the flat 4 wire connector.

 

Thanks for all the replies.

 

Yeah, if you see it with a vacuum advance cannister hanging off the side of it, that's not the one!

 

I'll take the 3 relays for 15 bucks shipped. Text me at 1 323 532 9468 im i California.

 

No relays for sale here lol

 

Be aware that the TPI version of the large HEI cap is lower than the other (normal) versions of the large HEI cap.

 

Interesting... my large cap is the "carbureted" version. Yet it's on a computer controlled distributor.

 

The large cap was used on plenty of full electronic distributors, so that's no surprise. I believe the TPI version was primarily for clearance under the TPI plenum extension trim piece.