On a 1965 Chevy Impala SS, what are the biggest rims could i install without the tires rubbing the wheel-well?

To be on the safe side, I'd say go with 20" rims. They are sort of at compacity for you type of vehicle. Looking at the wheel well, 20" with lo pro's will be your best bet and I know it is going to look great!

so the starter is working?? if the starter is cranking then the engine is popping over whether it won't initiate. if it is the case then your starter/alternator/battery is fantastic and you could look someplace else. If it only clicks without turning the motor then you definately could have the alternator checked. looks like a obtainable vapor lock situation. gas in the carburetor or gas strains can get so warm that it starts off to boil. This reasons extra air in the gas strains and carb so the engine does not get adequate gas to initiate. i'm assuming it has a carburetor and a mechanical gas pump fixed on the engine and not gas injection with an electric powered gas pump. attempt insulating the gas strains and pump from the warmth of the headers and spot what happens. or you could desire to attempt repositioning your gas strains faraway from the exhaust and positioned a small electric powered gas pump on the returned of the vehicle (even only quickly) to work out if this facilitates.

rims can go to about any size , as long as tire profile is lessened with every increase of rim size within limits

You don't have a lot of room under there.8" corvette 15" rally wheels will fit,but it's reaaly close.