Water pump bolts!
Team Owner
Joined: Sep 2003
Posts: 25,344
Likes: 2,727
Maybe a JY visit - they'd be the same on any of the LT1 or L99 (4.3) Chevy, Cadillac and Buick.
Melting Slicks
Joined: Sep 2010
Posts: 2,422
Likes: 202
When i built my 383 i walked into fastenal. And purchased 6 stainless shoulder bolts to match the OE length. My 4 long bolts are 4.0" the threads go in the block .705" with a split washer under the head of the bolt.
Last edited by THE 383 admiral; May 4, 2016 at 01:12 AM.
Race Director
Joined: Aug 2000
Posts: 11,470
Likes: 763
3/8-16 X 4 1/2 Flange Head will be a tough find and I believe they've only got maybe 3/4 - 1" of threads and a very long shoulder. Very tough find. Possible though. Is that the dimensions of what you've still got?
Maybe a JY visit - they'd be the same on any of the LT1 or L99 (4.3) Chevy, Cadillac and Buick.
Maybe a JY visit - they'd be the same on any of the LT1 or L99 (4.3) Chevy, Cadillac and Buick.
, tough find. try McMaster-Carr - they are grade 8 - a bit overkill. $3.70 each, but you have to add S&H. 
note: I cannot verify the size and application of the subject hardware - not a lot of experience with LT1 cars. WV is very knowledgeable though, so posting the source as a suggestion.
I just about always have an on going, open cart, with odds and ends from MMC - good source for hard to find everything - reasonable prices, reasonable shipping, good quality. http://www.mcmaster.com/# --
Last edited by Joe C; May 5, 2016 at 08:18 PM.
Instructor
Joined: Feb 2015
Posts: 234
Likes: 20
From: Stuart Florida
Melting Slicks
Joined: Sep 2010
Posts: 2,422
Likes: 202
$12.xx per bolt!! they better have a 24K plating.
https://www.fastenal.com/products/details/1170119?r=~|categoryl1:%22600000%20Faste ners%22|~%20~|categoryl2:%22600001%20Bol ts%22|~%20~|categoryl3:%22600003%20Cap%2 0Screws%209and%20Hex%20Bolts%22|~%20~|sa ttr02:^%22Stainless%20Steel%22$|~%20~|at trlength:1750|~%20~|sattr04:^3/8%22-16$|~
https://www.fastenal.com/products/details/1170119?r=~|categoryl1:%22600000%20Faste ners%22|~%20~|categoryl2:%22600001%20Bol ts%22|~%20~|categoryl3:%22600003%20Cap%2 0Screws%209and%20Hex%20Bolts%22|~%20~|sa ttr02:^%22Stainless%20Steel%22$|~%20~|at trlength:1750|~%20~|sattr04:^3/8%22-16$|~
Last edited by THE 383 admiral; May 6, 2016 at 04:09 PM.
Race Director
Joined: Aug 2000
Posts: 11,470
Likes: 763
$12.xx per bolt!! they better have a 24K plating.
https://www.fastenal.com/products/details/1170119?r=~|categoryl1:%22600000%20Faste ners%22|~%20~|categoryl2:%22600001%20Bol ts%22|~%20~|categoryl3:%22600003%20Cap%2 0Screws%209and%20Hex%20Bolts%22|~%20~|sa ttr02:^%22Stainless%20Steel%22$|~%20~|at trlength:1750|~%20~|sattr04:^3/8%22-16$|~
https://www.fastenal.com/products/details/1170119?r=~|categoryl1:%22600000%20Faste ners%22|~%20~|categoryl2:%22600001%20Bol ts%22|~%20~|categoryl3:%22600003%20Cap%2 0Screws%209and%20Hex%20Bolts%22|~%20~|sa ttr02:^%22Stainless%20Steel%22$|~%20~|at trlength:1750|~%20~|sattr04:^3/8%22-16$|~
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