V8100e

I've been thinking about going the pinto route in my Prefect and have a few questions before I fully commit! What sort of mpg would a hot 2.1 pinto on twin 45's get, 4.10 gears, all steel body, 5 speed box?? And would a 9" ford axle work with a pinto? A few people on other forums have given me mixed answers, some say yes but will take a bit of power to move it, but would be good for drag racing/launches and others say no cos it'll take way too much power to turn it!!(I've already got a 9" axle,fabricated case, 5 linked etc) Any info would be greatly appreciated so I can decide once and for all which way to go!