got to agree with the above bought a 2.25 from ACR with the cam, carb, head, and exhaust, fitted megajolt and it goes quite well!
cost an absolute fortune if i did it again i would v8 it.
certainly not a patch on a good v8 maybe a sick 3.5 but not as good as expected.
fuel economy is a wose than a v8.
in other words DONT DO IT ! unless you really have to.