[SHaFT7]

do need to move to a 255 hi pressure or will a 190 work with 42's (combo is 306/ tw heads / blower cam / powerdyne 9lb)

 

[SHaFT7]

nm, buying a 255....

 

[ALLEN 1]

You will need a T-rex pump as well. I would use a 255 intank as well. You will be safe to 550 horse with no FMU.