As long as the engine is in great shape, well tuned up you are OK, probably $50.00 to fill up with gas, but it is a Hot Rod, who cares. What is bad for the enviroment, try such things as industries, space shuttles, passenger jet planes, sewage drains from your place of residence draining into rivers and lakes, nuclear power etc....
I have a 454 in my truck. I'd say it's not as fuel efficient as other motors, but I don't think it makes any more polution than other motors of similar size and age. If it has a cat converter(or two) in good condition, it probably runs a little cleaner. My truck takes about $90 to fill up. But you have to factor in the cost of the gas you're using(regular or super unleaded) and the size of the gas tank. I'm sure my gas tank is a bit bigger than yours, so you may not spend as much to fill up. I bet that's a cool ride you got there. Take care.
