Hey everybody, Just thought I'd throw this out there: the distributor roll pin on a stock Buick V8 or V6 distributor is 3/16" x 3/4". I had to go buy every size of pin at the tractor supply store and try them until I found the right one. By the way, I won't be ordering from Poston's anymore. I ordered a distributor gear last Saturday and a week and a half later, I finally had to call them for them to tell me that it had been discontinued. I guess they don't realize that some people use their Buicks as daily drivers.:rant: Then again, their customer service has never been that great anyway. Well, just thought I'd let ya'll know. -Clay