Classic/Antique Car Repair: 1972 C20 low top end, rear axle ratio, factory option


Question
I would like to make this pickup a daily driver, consequently I need a fairly sound way to increase top end.

Answer
Your question is a bit too brief.  Tell me which engine it has, which transmission, which rear axle ratio, what size tires.

Tell me what you are trying to accomplish.  More top speed?  More power at top speed?  Faster acceleration to top speed?

I won't get into major mods, but if there is some other original factory  option that will help, I'll list it for you.

I'm really not here to advise on trucks, but I'll at least give it a try when I get the needed info from you.

Dick