iron duke / 3.0l merc

[wentzel88]

  will roller rockers from small block Chevy fit what  can be done to improve hp and not hurt mpg will roller rockers from small block Chevy fit?  what about roller lifters? what  can be done to improve hp and not hurt mpg   thanks for your comments

[CBBR]

fuel in NZ is about $4.38 USD. $3.08 in USA  not sure but i think that the more power you have then the less you use, but you only have a single stage unit so dont over do it or you will need to make changes to your unit.