New Holley 3310 carb - is the aluminum version a good option?

[Backpacker]

On Holley's website they show 3 different types of the 3310 carb: Dichromate(zinc body), polished aluminum(zinc body), and polished aluminum(aluminum body).

Considering today's fuels, would the aluminum unit dissipate heat better than the zinc, but suffer from oxidation issues?

 

[rumblefish360]

I’ve been running Carter & Edelbrock aluminum carbs for decades without issues external or internal on regular gas (87 - 93 octane) pre E10 days and of course, the current mix, E10.

 

[old guys rule]

Aluminum dissipates heat quicker but it also absorbs quicker

 

[old guys rule]

Aluminum may be better for hot starts though

 

[RJRENTON]

IMHO....The origional Holley 780 CFM R-3310 Model 4150 was zinc dichromate colored. Subsequent variations, the R3310-1 and the -2, were also zinc dichromate colored. The newer variations, -3,-4, etc switched to aluminum bodies, either polished or not, changed to 4160 designs and 750 CFM. Which is better??? My preference is the R3310-1. I believe the origional R3310 design was built for the GM L-88 application. The R3310-1 was made for the after market and with the optional hardware (throttle and kick down linkage) was easily adaptable to Mopar and Ford. Just my opinion of course.
BOB RENTON