Misfiring all over the place.

[EdwardSams]

About a week ago I took my 70 out for a ride and it was running fine for the first hour and then after shutting it down to grab pizza for the kids it started right up but was running rough.

Got it home, let it rest, and the next day I fired it up and it ran rough from the start. Sounded like it was missing so I asked a few friends for advice who suggested I start with wires and plugs.

I swapped the plugs and wires and it’s still running rough. Tonight I did notice a missing header bolt and another was loose. Tomorrow I’ll get new bolts but can that be the root problem?

A friend suggested check vacuum lines. All look ok.

Now One friend is saying it’s timing. Another is saying cap and rotor(I’m running a Mallory HEI and it’s a 350). Another is saying carb (Edelbrock 1406). I’m kind of lost.

This newbie would appreciate any suggestion of appropriate next steps.