63mm TB

[Locobob]

Originally Posted by Aurora40

I think only the 1990's had that. I'm pretty sure for '91 the vacuum stuff moved around a bit.

Yep - 90 only. The boss is still there on the later castings though - you could drill it out and add a fitting.

[lbszr]

Originally Posted by Locobob

Yep - 90 only. The boss is still there on the later castings though - you could drill it out and add a fitting.

Drilling and putting in a fitting with loctite 620 worked good. Didn't feel like figuring out the replumbing.

[Locobob]

I'm doing a port job for Frank T. right now including enlarging the throttle bores to 63mm. Here is what the difference between stock size and 63mm looks like - area marked in red is to be removed.