Called Jegs tech again.  This guy recommended the 465 as being more than adequate, even with my cam.  Indicated that Id have to play with secondary springs due to lower vac, but it should work fine with some tuning.  I think thats the one Ill order and see how it goes.

I do want to say THANKS to everyone who chimed in.  I honestly cant tell you how much I appreciate your thoughts and input; thanks again!!!!!

Ron Grove

Wauconda, IL

My carb of choice for the Y-block is the Autolite 4100 spread-bore built by Pony Carbs. They will set it up for your driving conditions. It has worked flawlessly on my 57 Custom 300 for many years. Check out their website.

I question the Jegs tech guy's knowledge of carburetor operation.  He said secondary springs may have to be juggled due to the lower vacuum because of the cam.  The secondary operation is not based on manifold vacuum, but venturi vacuum.  The secondaries open when venturi vacuum in the primaries indicate the need for more throttle opening.  Just my 2 cants.

John - "The Hoosier Hurricane"

To be fair John, I may have misquoted him.  He certainly said i may have to mess with the secondary springs to control timing of secondary opening, but he may have only been referring to it in relation to the weight of the car, cam peak rpm range, etc.  I may have misheard him relating it back to manifold vacuum.

Thanks!

Ron Grove

Wauconda, IL