holley carbs for 67 Z and L78

[rare4k]

can someone tell me what the differents between the 3810 and the 3910 are? both are in the holley book for the Z and l78 but i see the metering blocks use a different no# but what else?

[JohnZ]

The 3810 was never used on a Z - it's a 585CFM model 4160 single-inlet with only a primary metering block, secondary metering plate only, and non-externally adjustable needles/seats; was used on '67 Corvette 327/300hp and 327/350hp engines. The 3910 is the 780CFM model 4150 dual-feed used on the '67 Z.

[rare4k]

thanks a bunch phil