Also, just FYI- If you haven't seen a Factory Five body straight out of the mold, they need a LOT of body work. The Hurricane body out of the mold is fantastic. Minimal seam lines. in fact, my cobra is not even painted yet. I just polished up the gelcoat and slapped decals all over it.
I took 6 years to finish my Hurricane build, paying along the way, taking breaks (really 7 years counting a year of finished up and sorting out after it was titled/registered).
You can get a very good 450hp crate 351 small block built by Craft Racing in Arkadelphia, Arkansas. Mine is 351w/427cid 600hp/600tq.