No Power under load

[mookiex4]

Hi all,

I have a 1965 GMC with the 305 V6. It has started acting up, by losing power under load. When climbing a hill I have to shift down just to keep it at 40 if I am lucky. Starting from a stop it really drags.

I gave it a full tune up with new points and nothing.

I timed the engine and nothing.

The carb is less than 2 years old and adjusting the fuel mixture hasn't helped.

I converted to an electric fuel pump. Didn't help

The engine has a rebuild less than 50k. I am at a total loss. I am trying to keep it running long enough to get my 327 from my fathers place which is unfortunately out of town.

Any help or suggestions would be greatly appreciated.

Mark