Thanks for the advice. My 305 is using an Accel points distributor that does NOT have vacuum advance. Also, the front of the coupe is pretty low to ground so I'm not sure there would be room for a spoiler but I will check. I am also thinking about adding heat control wrapping to headers to try and keep heat out of engine compartment. I would appreciate hearing from any one with experience using exhaust wrap, (it's like tape you wrap around header pipes). Does it really reduce underhood temps?