OK, I'll give a little more information.

I really appreciate all the help you guys give.

250 Chevy
Bored .030"
New dished pistions, bearings ect.
Lots of port work done, polished, larger int. valves and stainless exhaust valves
Comp 252H Cam
Langdon's headers, Offy 3x1 intake with MV Rochesters.
I will most likely be adding a MSD box to the existing HEI I already have. I would like this to start as quickly as possible when turning the key. Essentially what I wanna know, is if an electric pump would help me reach that goal, or if I should stick with mechanical?

As far as using the 292 pump with a 3/8" outlet...
The carbs I'm using have 5/16" inlets, should I simply install adapters to use 3/8" line? Or in my case should I stick with 5/16" all around.
**AND WHAT YEAR 292 PUMP**?

Thanks AGAIN!!