Might be nothing but NON magnetic feeler gauge for setting points?
Im sure my 67 273 is set at 0.020 intake and exhaust. Comp cams cam n lifters tho.
Shaft tight on distributor?
My thoughts,Steve... (Brass feeler gauge,IIRC..Have set reluctor gap,with steel feeler ..It runs...)
O.P.: I would personally,would start with: Post 9 : accuracy on valve adjustment...MANDATORY.(my opinion,I don't have a clue,on how you adjust valves..) Post 12: check condition of points,and learn to adjust them... https://www.google.com/url?sa=t&sou...pvqHf_ZsX069MBpDA&sig2=1eiQ4Y67U1Pgv5g26q5KgQ
Get an actual dwell meter & timing light... Borrow ,buy one,invite a buddy who has these tools,fix it...Electronic ignition swap is nice, doesn't fix the root problems...(just my 2 pesos valued ,response....)