Is this vapor locking, bad pump, or something else?

[hey mister]

I also vote for restoring frame to original length.

I passed up so many C10s because the owner had hacked the frame.

 

[Broken85]

This should help. 454 and towing. Go for the third tank

 

[hey mister]

This should help. 454 and towing. Go for the third tank

I never heard of a 3rd tank.
My dad had a 73 surb with 454 and tow package. It had twin tanks...Man, I don't know where you could tuck a 3rd tank in...lol

 

[kkgp81]

It would go in the rear of the frame.

 

[Broken85]

I never heard of a 3rd tank.
My dad had a 73 surb with 454 and tow package. It had twin tanks...Man, I don't know where you could tuck a 3rd tank in...

On a K or C the third tank would replace the spare tire in the back with a Suburban or K5 tanks. Suburban tanks are around 40 gallons.

 

[hey mister]

Oh, I do remember that tank being huge.