The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - What did you do with your truck today, Part 3

mick53 · 11-17-2019, 12:10 AM

I figure I will clamp the 292 cover on the mill and set the boring head to exactly the same as the existing hole and then using the same center enlarge the hole to 3.6" Then using the big block hole on the rotary vice with the self centering vise in the hole I should maintain the center and mill it down to 3.6". This keeps me just outside the collar on the big block cover and just inside the screws on the 292 cover. I should be able to drop the big block collar in the 292 hole and maintain the center. I don't think it has to be within .oo1". some of them are made out of plastic and have some play when you mount them. I realize it has to be close but not space shuttle close.

11-17-2019, 12:10 AM	#3986
mick53 Registered User Join Date: Oct 2018 Location: Warsaw IN Posts: 887	Re: What did you do with your truck today, Part 3 I figure I will clamp the 292 cover on the mill and set the boring head to exactly the same as the existing hole and then using the same center enlarge the hole to 3.6" Then using the big block hole on the rotary vice with the self centering vise in the hole I should maintain the center and mill it down to 3.6". This keeps me just outside the collar on the big block cover and just inside the screws on the 292 cover. I should be able to drop the big block collar in the 292 hole and maintain the center. I don't think it has to be within .oo1". some of them are made out of plastic and have some play when you mount them. I realize it has to be close but not space shuttle close.