Which Carb to Choose

Hi
I have a little 350 small block chevy. The only modification I made is :

Camshaft with lift:477/480 and duration@50: 224/231.
Valve spring that fit with my cam
make 3 angle valve seat and 2 angle on valve
I got a pair or 882 heads
aluminium intake
for the rest it is almost stock
I have no high stall torque converter
3 speed automatic th-350
run on manifold for the moment but I plan to have it

Now, somebody told me that it will be better if I put a vacuum secondary, but I've got in mind to put a holley 4150 650cfm mechanical secondary double pumper

Is it good or bad ??
Any Carb suggestion ??
Thanks at advance guys!!

A double pumper and auto trans on the street is a poor combination as the secondaries will tip in too quick when you mash the throttle and you will experience a lot of bog. I would recommend a 650 vacuum secondary carb of your choice.

[QUOTE=NTFDAY;356719]A double pumper and auto trans on the street is a poor combination as the secondaries will tip in too quick when you mash the throttle and you will experience a lot of bog. I would recommend a 650 vacuum secondary carb of your choice.[/QUOTE

I would have to disagree on a healthy street big block with a decent cam, Ive been very sucessful running a mechanical secondary carb that always had the throttle response quicker and more overall power than a similar vac secondary cabr. With that being said beased on the basically stock small block, yes the only way to go is small vacuum seconday style Holley or even better yet I like a QJ.

the first thing most new people to hot rodding do is over carb there engines. try a eldebrock carb. better for the street. my experience with holleys is not good,they leak,need adjusting all the time.the carter type you set it once and forget it.

I just put a Comp Series Thermoquad on my 350, and it loves it, but I think rebuilding a Quadrajet is the way to go. $20 for a core, $20-40 for a rebuild kit from Napa, and a lot of fun putting it together!