mismatched 351, i have some answers.
 

I found out that it's not a roller block, but the maf has been calibrated for the 30 pounders, & it already has 351W heads on it already, & the exhaust side has been ported. I'm thinking of getting 3.55s, pulleys, & traction bars, maybe an aftermarket ignition with coil. I'm shifting at 5000rpm, & I'm in 3rd when I go through the trap. If I want to replace my oil sending unit, should I get one for a 5.0, or 5.8. How much horsepower could I expect to get from an electric fan? Thanks for the help.

10hp with electric fan