Casting numbers while determine 2 or 4 bolt mains. Without my book in front of me I believe the 2 bolt main blocks are 960 and the 4 bolt main blocks are 961. Considered a "high performance option" like the 396/375 HP, the '66 396/360 HP and '67 396/350 HP had only 2 bolt mains.
Krister Meister Bartlett, IL '66 SS #'s matching 360 HP option Bill wrote: The best way to check is get the casting number off block in question and check it on the Mortec site...... there are definitely some casting numbers that can be either 2 or 4 bolt , 4 bolt being for the high HP version of the engine and 2 bolt for the low HP version......375hp sb a 4 bolt FWIW ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, August 13, 2002 7:50 PM Subject: Re: [Chevelle-List] looking for a straight answer > In a message dated 8/13/2002 7:32:43 PM Eastern Daylight Time, > [EMAIL PROTECTED] writes: > > << Are 396 375hp all 4 bolt main blocks? Or did some come as 2bolts. I have > been told both. Just looking for clarification. > >> > All 375hp's were 4 bolt...a few 350hp's were also 4 bolt but mostly 2 bolt. > John, 67SS396 > ----------------------------------------------------- To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
