hello. the engine miss-fires at idle speed. i have gone through and replaced just about everything that i can think of. the only things left i have to replace are the ignition coil & a new set of electronic points. i have eliminated that problem before on other cars by completely re-doing the vacuum lines. i was hoping that would make a difference on the maverick. if anybody has any suggestions please let me know. about the '75 comet, that sounds great, i live in san diego . where are you? i have a 250 with the 1 barrel carb. if you have a different engine, i don't know if the lines will be the same or not. thanks for getting back to me folks. tim