We always drove our cars a lot. My brother put a 300,000 miles on his 67 Barracuda with A/C, I only put about 250,000 on my 64 barracuda and about 100,000 miles on the 68 original 383 fastback. Both the 66 and 67 have 273's, mine high performance, his stock 2 barrel with a 340 TQ and both...