No, I think the ignition is a good place to start working on the misfire, and I will keep fiddling with the heat riser, but just as a secondary thing now. (I have a 1954 stock 235 with a Rochester B). Once I’ve gone back through the ignition and tested it on the road, I would go back and check the valve lash at TDC instead of the ball. I was mistaking the ball for TDC and adjusting valve lash with the ball in the needle. If I’m thinking correctly, setting valve lash on the ball would mean I have set them too tight because the valves would not be fully closed, correct?
On the dual exhaust, I think there are several great responses from everyone about where to either find a dual exhaust kit and options for headers. Also, it sounds like if one wants to go dual exhaust, there will likely be some necessary “adjustments” required for whatever option you choose. I’m hopeful now that I can get the engine smoothed out and keep working on the riser without pulling the manifolds off.
Thanks to all, and I’m hopeful I’ll get things smoothed out and unstuck!
Mark
