Horsepower with mileage options

I had a 318 in my 71 dart.
Bolted on aluminum intake, a 4150 and headers.
It was fun enough and got decent MPG and looked great to the untrained eye with the hood open.
it probaby had 300,000 miles on it when the float got stuck and washed 5 gallons of raw fuel into the oil killing the mains.
I drove that car every day for 10 years with almost ZERO maintanince, just gas in the rear and oil in the front.
The 14" tires were dirt cheep, I would white smoke the one to the cord then slap it on the other side and drive more. Total cost about 1,000.00 bucks.