The old standby 302 5.0L or 351 5.8L pushrod Ford Small block has been around forever and for good reason. Small cubes mean quick and high revving with a high torque curve that made the Mustang V8 a stoplight performer and drag strip warrior. Mustang budget short block is a great choice if your pony has lost some of it's stride or a completely built Ford Racing Crate motor would work just as well between the frame rails of your Mustang driver or racer. Lot's of short blocks, long blocks and crate engines for your Mustang pleasure.
Working in a customer service oriented job I can truly appreciate minute by minute notifications and incredible customer service. I am building my seventh fox and have dealt with every known distributor on the planet and LMR is by far the most efficient and thorough company I have dealt with.(twisted wedge top end kit and supporting equipment project starting this week)