454 mileage

[mopar346]

I take it they are show tractors.

I thought about a swap last night, and if you did something like a 8.1 conversionfor are going to spend probably 3k to get it right and you will pick up 2-3 mpg, so let's use the high side. If you are currently getting 12 (for easy math) and you go to 15 then you will pick up a gallon every 60 miles, at $3.50 per gallon you would have to run over 51,000 miles to break even.

$3000 / $3.50 = 857.14 X 60 = 51,428

So do it to save money is a misconception, doing it for fun or better power it can be justified because of desire, but not economics. And yes, other swaps can be done more effeceintly but the math is still there and 3 mpg is a pretty good pick up.

Now an LS swap MIGHT make the math work because you will get more than 3 mpg and probably be well less than 2 grand if you plan it right.