casting dates for 427/390hp

[rocketrb]

where (on the block) do I find the casting dates? Ithought they where on the pass side below the firewall ? and what suffix code should be on the front pad for 427/390hp '66 . thx for all your help

 

[67HEAVEN]

where (on the block) do I find the casting dates? Ithought they where on the pass side below the firewall ? and what suffix code should be on the front pad for 427/390hp '66 . thx for all your help

Hello and welcome to CAC.

For locations, check here - http://www.mortec.com/location.htm

For codes, check here - http://www.mortec.com/bbc.htm

 

[WayneC]

Suffix codes:

IL ... 4 speed
IM ... 4 spd w/air injection
IQ ... Powerglide
IR ... Powerglide w/air injection

 

[vette]

casting date is on the side of the block , behind the exhaust manifold