ok so im new to this but ive got a 79 mustang that the motor blew in it so i put a 93 f150 5.0 in it and converted it to carb cuz thats wat it was before but it back fires threw the carb i bot a new distributor a new coil n the carb was new. i had had the timing set to 10 degrees cuz thats wat i was told to put at n had it perfect