Nalrops

I'm in the process of ordering parts to rebuild a Holley list 3605 (AIR) carburetor. I removed the secondary diaphragm and found the number 330 stamped just above the linkage hole. I believe it to be a 135-4. Not sure if that's the correct one and of course I'm not wanting to duplicate somebody else's mistake if it's not correct.

Ive done quite a bit of research here, holley documents, the overhaul and service manuals, google searches and can't confirm the correct replacement.

I know there are others here on the forum who own same Carb, have no doubt rebuilt there's and can probably tell me the correct diaphragm kit. I am aware of the recommendation to use the softer yellow spring.

Thanks to to all who respond.

DSR

I don't know the answer, but I have used the Holley call in tech line before and they were very helpful.

Nalrops

DSR, thanks for your suggestion. Holley does provide great support and I may have to contact them. Was trying to get my parts ordered this week so I'd have what I need when my carb comes back from plating.

Tom454

LIST #3605A (R-3605AAS) model 4160-C GM#3890499 View 24-2 shows secondary diaphragm & rod assembly #106 varies by application. This means that all model 4160's don't have the same secondary diaphragm. The part listed for this application is 35R-235A or 35BP-235A (1966 Corvette 327 300 & 350HP). I don't have a cross reference for 35R-235A because most Holley Literature ignores this LIST#3605.
35R-235A needs to be crossed to the generic number (such as 135-4). This web site indicates 135-4 is correct:
https://www.carburetion.com/Products...px?part=64-197

Nalrops

Tom454, thank you for doing this research. I know it takes time and effort to do this so I appreciate your effort. Looks like you knew exactly where to go and what to look up. Thank you very much.

Tom454

You're welcome. I have a 55 year relationship with Holley's so it was an autonomic response. LOL