Well, the bushing didn't fit. It was a little to big. I believe because of poor finish and burrs in the crankshaft hole. I took the bushing mounted on my slow speed buffing machine with a file and emery cloth till.it fit.
Here is a bushing option for un- machined crankshafts BOP & Chevrolet https://dickmillerracing-com.3dcartstores.com/Crankshaft-Pilot-Bearing-Adapter_p_49.html
I read that and modifying the input shaft to me is a non starter. Modifying a couple dollar bushing looks to be a better option.
I'll post a picture a little later. The slow speed buffing machine file and emery cloth worked perfect!
Back in the 1990’s I had an off the shelf GM aftermarket bushing od diameter turned down to my specs when changing my street/drag car to a 4-spd. It worked great for years without any problems.
Make sure the OD is concentric with the ID or else there will be chance of a vibration. In other words, it needs to be machined on a lathe
I did some re-checking and I think you saved me from a mistake. Do not think the bushing is perfectly centered and will be removing it. The area in the bore in the crankshaft that holds the bushing has burrs and looks to be unfinished and not allowing a straight press. I will be needing a Buick friendly machine shop on the East coast to help me through this.
Contact BUQUICK on this board as he also lives in Md. He may be able to help or steer you in the right direction. Tom T.
I wound up dropping my crankshaft to J&B Machine Shop in Rosedale MD. They said they have corrected issues like this on the Pontiac 455. I will report back.
It's BQUICK (Bruce Wilson) not BUQUICK (Gary Steele) AL, glad you got hooked up. Did Mark Small recommend J&B?
No, I did some checking on the web and like what I saw. I will report back on how things went. BTW, let a voice mail with Mark Small and he didn't respond.
There is no special machining of an auto crank to install a pilot bushing. No need to re invent the wheel. Bushing needs to be turned down and made slightly shorter. It's all in the linked thread