Big Block Valve Cover Bolt Question

Home: Goto Homepage.
Subscribed: See all threads you’ve posted in or started.
Today's Posts: Posts made today. Bold = unread.
New Posts: Shows all unread posts since last visit.
New Thread: Newest threads by creation time.

**olredalert** · #1 07-04-2010, 05:45 AM

-----Early are the 3/8ths and late are the 7/16ths. Both are quarter-twenty thread. Im not sure where the break is during the year but my cousins 450hp car that he bought new had the small heads and his car was serial# 700 even. My 425hp car was delivered in April and had the large head........Bill S

**mssl72** · #2 07-05-2010, 07:58 PM

Thanks Bill! We wondered about a change at some point, but couldn't find any documentation as of yet to support it. Maybe a supplier problem?? Who knows for sure. If anybody else chimes in with theirs, maybe we'll see a pattern.

Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars.