C3 AC Compressor

[vetman]

Looking for some resto help... I am looking for a replacement AC compressor for a 68 327 small block, which was originally supplied with a Frigidaire Model 5910645. I can find a new compressor with no problem. The issue is I need to choose from a clutch/pulley size of either 5 inch or 5 3/4 inch. Since the car had no compressor when I bought it, I can't look at the old one... Anybody know which size is correct for the year?

Thanks.

[aquaholic]

is the engine a 327/300hp or a 327/350hp ?

[vetman]

The engine is a 327/300.

[aquaholic]

i checked all my Corvette and Delco parts books and they all show the 5_3/4" diameter Gr 9.180 #5914745, Delco # 15-216 pulley. the only other pulley i see is a 6-3/8" for the big block. my parts interchange manual shows either the 6550133 or the 5910645 compressor used on the 68 (probably an early vs. late thing) and the 5910645 used on the 69. i was looking for my 68 ncrs manual but i must have gave it away when i sold the car.