I'm thinking of buying a 1988-1992 Camaro wit a TPI 350. Most of these cars, being 10 years older or more, have lots of miles on the odometer. What I want to know is how much does mileage affect performance? Will a ten year old car in good condition but with 70,000 miles on it perform as well, or almost as well, as it did when it was new? What if the engine gets tuned up or rebuilt? If it doesn't perform as well, how much worse will it be?

 

It depends on how the car was taken care of.

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350 with stealth intake, holley carb, 470 lift cam. 700r4 with .5 boost valve, vette servo, tci lock-up kit, B&M megashifter. Richmond 3.73 gears, powertrax locker, timkin bearings, synthetic lube. Custom 3 inch single into 2 2.5 pipes. 1 1/2 drop springs, 1 5/16 solid front sway bar, 1 inch rear bar, custom subframe connectors, custom LCA relocation brackets. Kobel ground FX, current red metallic paint. Lots of other stuff...
82camaro

 

There shouldn't be much difference if it only has a true 70,000 miles on it and was maintained properly.