Got it in yesterday (that coil/OE 75 black chebby HEI module/bypassed ballast) & went for a quick spin & no noticeable difference. It did appear a slight bit smoother running but that was likely my expectations (it was hot & the eng compartment is too high for easy access & I wanted something good out of my efforts!). I hope it don't die & strand me & I will update if I notice any difference in driving in this upcoming week or so.