hi mate, not to be a spoil sport but cheap and reliable are pretty difficult to put together, ie, it maybe cheap for a reason.
Camaros, especially 4th gens are reliable, but do have there issues no matter what engine and if they are in good condition and have been maintained pretty well then they will be reliable, but usually the better looked after cars pull more of a premium. Saying that, they will be mechanically reliable, even if the electric windows dont work etc...really depends what you want....
Keep your eye out on ebay and see if you get anymore replys on here.
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'99 Z28 A4, 253 LS2 heads, 228R TSP cam, Patriol Dual Springs, Double roller timing chain, LS6 ported oil pump, OBX LTs, 3" True Duals, LS6 intake, 42lb/hr injectors, SLP lid + bellow, EFIlive COS 3 Speed Denisty Tune (self tuned), 3200 Circle D stall, CAI mod, KYB AGXs, Eibach Pro Front Springs, UMI panhard, LCA + Brackets, Strut Brace, Custom Subframe connectors, WS6 axle with 3.42s, 18" American Racing Rebels, US mirrors, 93 tail lights, 3.5 inch custom cowl hood. Mickey T's Street DRs on Vette-ZR1 wheels for the strip !
Best ET: 12.0 @ 116 mph (on a 0-60ft of 1.8 s)