Testing the 273 on the dyno....

Mattax said

Net peak, per J245
https://www.hamtramck-historical.co...alershipDataBook/1972/72_Plymouth_Specs_4.jpg

Gross peak,
https://www.hamtramck-historical.co...DataBook/1967/67_Plymouth_Engineering0007.jpg
https://www.hamtramck-historical.co...DataBook/1967/67_Plymouth_Engineering0008.jpg

Click to expand...

hard to believe those 440 numbers , my father had a 440 new yorker in 1972 and it would smoke the tires no problem cruise at 120 mph all with 280 hp and 375 tq ? sure felt like more back then , car was fast for a heavy boat