i have a 1983 dodge mirada..certainly not vintage muscle..but my driveline is out of a 69 cuda...while having some engine troubles last season, i ran my buddys DSM sebring,...4cyl 5 speed...on the bottle...lowered...and now he got a turbo/new block/P&P head...thermal exhaust, quaiffe, neon RT diff...so the bottl might be in my RT this year...