I need a 600-650 vaccum secondary carb and will trade a brand new 650 double pumper or 750 vacc secondary (maybe both) for a GOOD (holley/road demon?)one in my range.

Thanks for reading.

I have a 600 Holley, but I'm curious... why do you want to swap??

this guy has a 625 hes not using anymore

http://www.c3vr.com/vrforums/message_go.asp?MID=46930

oops looks like you already knew that

|UPDATED|8/11/2004 6:37:07 PM (AZT)|/UPDATED|

I'm really new to corvettes and chevy's - converted from the Ford side of things...

So, from what everyone's is telling me, the new 650dp that I was going to install is totally wrong for my TH350 vette that weighs >3400lbs and street driven. Also, the 750 vacc sec is too big. I'm running a rebuilt by holley qjet and getting a huge bog when the secondaries open so it seems I just need something smaller.

I'd be interested in the 600. What kind of shape is it in?

you can detune your 750 to work right.. reduce the sec jet size and put in a stronger secondary resistance spring so it doesnt open as early..

this would save you the swap..

First of all let me congratulate you on finally seeing the light.
The 600 is on my 74 L82 with Th-400. I rebuilt it last year as it was leaking. It doesn't bog, starts really well,pulls strong, and gets 20mpg. Having said that and considering the reasons you want to get rid of the 750, I think I would probably end up with the same problems you have, problems I don't really need! So I think I will keep it.Maybe consider what Ben said.

Yeah, I may try both out this weekend and see what happens

76x said: Yeah, I may try both out this weekend and see what happens

you wont be disappointed..