Several issues after 700R4 swap - any ideas?

[delosh]

Looking for solutions...

67 with stock 283, stock points ignition, stock 2 barrel carb and 3OTT manual.

I just swapped in a fresh 700R4, horrible quality steering column (which I will replace), a Holley 4160 4 barrel carb and Weiand 8150 intake manifold. Along with a long list of supporting parts (starter, flexplate, valve covers with vents, etc.). The carb and intake had to be replaced all because of no TV cable bracket support for the stock setup.

Picked it up yesterday after they were having a weeks worth of problems with the new starter working intermittently - click but not crank. We replaced with another brand new one and it too had the same issue. It started when I left the shop but would not restart after a fill up at the gas station. Waited 15 mins then it finally started.

The shop thought at first my ignition switch was bad because they saw an intermittent voltage drop on key turn (sometimes 12v sometimes 7 volts), but it wasn't, then they thought the 10 year old battery could be to blame – so I replaced it last night and it still presenting the same issue. Any ideas?

Another issue is the engine "missed" several times on the way home during acceleration – even shutting off completely once. Shop thinks perhaps the points setup should be upgraded to a HEI setup due to the carb/intake combo. Thoughts?