very perplexing problem

[gavinc69]

2nd that........where did you get the brace?

[don werner]

Thankx, I did.
Probably more bling than function.
Welded on the brackets when the car was stripped, then added the bars once it was together.

[Carl_Boehme]

Start it in the evening with the engine compartment open and look for little blue electrical discharges around the MSD connections especially at the coil connection.

[RoninLB]

your carbs may be dirty if you're using routine 10 micron fuel filters

a Racor with 2 micron filters is trick