Any Hot Rod carb tuners here

[Cigboat]

Just bought a 1969 Ponitac Lemans with a built 428. Radical cam with 5-6 inches of vacuum at idle. Has a Holly 750 double pumper. It is running rich at low rpm's and idle. I know I need to change power valves but not sure if a 4.5 valve will work. Any input would be nice..... Thanks Scott

[Sid]

Not at all.  I would probably go with the Holley Sniper EFI.

[Cigboat]

Is their a power valve that will work?? I would love to go to efi but funds somewhat lean right now...

[Sid]

Honestly, I stopped messing with carburetors years ago.  It seemed like you had to adjust them constantly to keep them tuned. 

[Cigboat]

Well I ordered 3.5's, I will let ya know the outcome...

[Sid]

Good luck.

[pinballcorpse]

Reach out to Fred (turboderf).  He is into Hot Rods and can probably answer your question or point you in the right direction. 

[Cigboat]

Thanks for all the replys. I did put the 3.5 power valve in and it did help, but with the radical cam I had to open up the secondary plates 1 1/2 turns and then was able to get the carb. Where it needed to be. One day I will go efi and a 4 speed auto so I can take her across the state... 😎

[Sid]

A carb is great for the dragstrip, but EFI is a must for drivability.

[Cigboat]

Sid, did you use efi on your toy? If so what system did you use?