zeus337

What makes and models were each if these for?
I have 66 327/300 a.i.r. Car and need to know which is factory correct for my car.

crank pulleys 3850838 BG & 3744043 BA

66jack

This is from the GM parts catalog:

RED...
69-70 corvette (350) 7 21/64" (OD) (ecx. P/S, C.A.C., H/Per., Sp. H/Per.)

Black
68 Corvette (2nd design) 6 5/8" (exc.C.A.C., H/Per., Sp. H/Per.)
1st design should be stamped, 3747479

zeus337

Does it show the specs on these related to 66 corvette?

66jack

NO....

This is what was in the parts book...nothing else...

zeus337

Ok thanks for checking. I gotta somehow figure out the use on 65 and 66. They were used on C2 also...

vark_wso

My original (July '66) 300 HP A.I.R. (non a/c) is configured as follows:

Crank pulley 3744043BA.
Water pump pulley 3790356.
Smog pump pulley 3880800.
Power steering drive pulley 3751232BB.
Power steering pump pulley 3770509CE
Alternator pulley 3843342AJ

(There is a crank pulley 3850836 -- used with L79 + power steering. Probably a deep groove).

zeus337

That's what I need to know. Looks like my configuration. NCRS didn't list that crank pulley for some reason. Thank you!

NCRS ADD THIS CRANK PULLEY PART NUMBER TO THE NCRS JUDGING GUIDE...

zeus337

Since u have a car like mine. What is the part number on ur water outlet cover. There appears to be 2 types and I need to Know which to use

vark_wso

Die cast aluminum, casting number 3877660.