Wasn't expecting a response from the OP on a 5 year old post so thank you! Your excellent documentation has provided the confidence to attempt it myself. I ordered the same kit from carbjunkys and my welder friend will ensure that the connection is sound. This is the final brick in the wall to sealing up my vacuum-sensitive L98. Will likely supplement this post with my own pics and insights when completed to continue helping others in the future.

 

Bringing this back again. I was wondering, did you ream the other end of the throttle body and put a bushing there as well or was it right enough that it didn't seem necessary?

 

i am not the OP but i did do both sides on mine.

 

I just did this on mine. It's an old SLP throttle body I bought ~33 years ago, when they used to take 48mm stock ones and bore them out. You can't get these anymore and I didn't want to get rid of it for a new one.

But, the procedure pretty much went flawless (except for me putting one one of the blades in upside down initially... doh!). I forgot these blades have angled edges. I couldn't get the engine to idle down. Once I figured out what happened and fixed it, it's all back to normal.

I had used red loctite on the throttle blade screws, and man...just curing overnight... trying to get that blade off... I thought the screws or the allen bit were going to break before the locitte gave out. And even after the screw got loose, it had a lot of running torque trying to get it out all the way. I was initially questioning whether to peen them or use loctite since I was worried about bending the throttle shaft trying to peen the screw. But after having to take that blade off, I'm convinced these screws aren't going anywhere.

Matter of fact, be careful about the throttle shaft as it's actually quite delicate... just with normal handling it managed to bend a bit. I had to use a straight edge to tweak it back so it went back into the TB smoothly.

I also used drilled and tapped the throttle shaft to screw the throttle shaft back on with a high-strength screw... also with red loctite. So I'm sure that'll hold too.

Any rate, the movement is like butter now... so silky smooth. You don't realize how worn out stuff like this is until you rebuild it back to new.

 

Nine years later and Carb Junkys is still selling this same kit. Dan