Holley Electric Choke - Internal versus External Vacuum Source - Team Camaro Tech
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post #1 of 1 (permalink) Old Feb 23rd, 19, 05:06 AM Thread Starter
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Join Date: Aug 2001
Location: New Jersey
Posts: 136
Holley Electric Choke - Internal versus External Vacuum Source

Have not been on this site for a while, sold my Z-10 a few years back and been working on the '68 el Camino SS I bought!

Recently had to change the Holley on the 400 SBC that I have on my '75, had a Holley 3310 (Dual Feed, Vacuum secondaries 750 CFM), put a Holley 4776 ( DFDP 600 CFM) on it, runs much better!

The 4776 has a manual choke on it and I have an electronic choke on the 3310, but the 3310 is setup for internal vacuum source where the 4776 needs an external vacuum source. The choke from the 3310 (45-223) looks like it should be able to mounted on the 4776 carb and the internal vacuum source would just be blocked off.

Anyone know if you can use the 45-223 on the 4776 carb and hook up the external vacuum source?

'68 el Camino SS 396/325 hp, 4 Spd, 3.31, Buckets, AC
'72 el Camino SS, 454 LS5, 4 Spd, 3.73 LSD, Buckets, AC
'75 el Camino SS, 400 SB, Turbo 350, AC, Swivel Buckets, PW, PDL
'87 el Camino Choo Choo SS (305 TPI, 200R4, 3.73 LSD)
'87 Buick GN Hardtop
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