- Joined
- Aug 3, 2010
- Posts
- 30,439
- Reaction score
- 28,345
- Location
- Usually not in Ohio
- First Name
- Andy
- Truck Year
- '77, '78, '79, '84, '88
- Truck Model
- K5 thru K30
- Engine Size
- 350-454
There's a very big difference between a 750 vac secondary and a 750 double pumper. A 750 can work fine on a 400 in a truck (or even a 350 for that matter), but only if it's a vac secondary. Agreed, a 650 will do just fine though.
