rb83l69 have question can you help
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From: belton texas
rb83l69 have question can you help
you replied to my post on what year is my 350 and said somthing about where holes where driled, the cam looks fine but can you be more specific on what the other part was thanks Jason
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From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
It's the starter bolt holes...
I don't know the dimension off the top of my head for the distance from the crank centerline to the hole centers so I can't tell you what to measure. But the deal is, one of the machines that gang drills bolt holes in blocks at the block factory — there must be about 3 or 4 of these, judging by the percentage that are fornicated — got out of adjustment in about 1972. It was about 1980 before they fixed it. So, that approximate percentage of all Chevy SB, BB, & 6-cyl blocks made during those years have this issue. The starter bolt holes are drilled too far from the crank by what I would guess is about .080"-.100" inch. That makes it all but impossible to get a normal starter to work really right, although sometimes you can get lucky.
I don't know the dimension off the top of my head for the distance from the crank centerline to the hole centers so I can't tell you what to measure. But the deal is, one of the machines that gang drills bolt holes in blocks at the block factory — there must be about 3 or 4 of these, judging by the percentage that are fornicated — got out of adjustment in about 1972. It was about 1980 before they fixed it. So, that approximate percentage of all Chevy SB, BB, & 6-cyl blocks made during those years have this issue. The starter bolt holes are drilled too far from the crank by what I would guess is about .080"-.100" inch. That makes it all but impossible to get a normal starter to work really right, although sometimes you can get lucky.
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