A.I.R. pump bracket for 74 BB any different than for SB
Can any one tell me if the BB A.I.R. pump mounting bracket is different than the one for small blocks and what the part number is? This is for a 74. Also would the bracket for a 74 BB differ from any other year BB?
-
-
Re: A.I.R. pump bracket for 74 BB any different than for SB
they are different as i had to get one for my 74 454 that lost its smog system in 74. think i got it from bill hod ell( ? spelling) , mike -
Re: A.I.R. pump bracket for 74 BB any different than for SB
Thanks Mike. I did find the info I needed.Comment
-
Re: A.I.R. pump bracket for 74 BB any different than for SB
Russ------
The big block bracket for 68-74 Corvettes was completely different from the small block bracket. The big block bracket was a fabricated steel bracket; the small block bracket was cast iron (66-67 big block brackets were cast iron, too, but different than small block).
The 68-74 big block bracket was GM #3919890. Attached is a photo of an original 3919890. Note the manufacturer's ID "triangle with a T" and the two very slightly raised circles on either side on the rear of the bracket (not visible with the bracket installed). These identify an original GM piece.
DSCN2965.jpgDSCN2966.jpg
BEWARE: there are some reproduction brackets out there that are WAY off spec and will absolutely not fit properly NO MATTER WHAT YOU DO. These brackets appear just fine UNTIL YOU TRY TO INSTALL THEM. These bogus brackets can be identified by tiny punch marks at each bend as pictured below. How much are these brackets worh. Well, I think that scrap metal is going for about 200 bucks a ton now or 10 cents a pound. These brackets weigh about 14 ounces so I'd say they're worth about 9 cents.
DSCN2967.jpgIn Appreciation of John HinckleyComment
-
Re: A.I.R. pump bracket for 74 BB any different than for SB
Thanks Joe for the great info.Comment
Comment