66 c10 engine upgrades

[Chevy nutcase]

My 66 c10 with its bone stock 250 runs fine but I think I can get more out of it. One thing I'd like to upgrade is the points ignition. I was wondering if a pertronix kit to replace my distributors guts is a good option or if just switching to a modern HEI distributor is the preferred method. Another component in question is the carb. Again it works fine but takes forever to warm up so I was considering a new carb and offy intake but again this is foreign territory to me as for what cfm the motor can handle. Love to hear your opinions on the matter