My dad was an auto dealer in the 60s & 70s. Always had lots of used muscle cars.....396s, 440 Mopars, GTOs, Vettes, etc. In high school I had a 64, 67 and 69 GTOs. Thought I was hot stuff but those cars were not really that fast. Fast forward many years & I got into Mustangs. Had 69 & 70 Boss 302s, 351W Mach Is,70 Shelby GT500, but the two fastest were a 70 Mach 1 w/428 super cobra jet (different motor than a 428 cobra jet), grabber orange with the shaker hood scoop. Tons of low end torque. Baddest of all mine was a 66 Shelby GT350 (candy apple red w/white stripes), really hopped-up 289, lots of R model options, 5 speed from a late model mustang, and four 48 IDA Weber carbs. The carbs really made that 289 sing but were a bear to keep tuned.

If you think doubles can be expensive.....muscle cars are in another universe cost wise. Been there and done that.