if buying a "block in a box" is the route you want to take, then id go with the FRPP Aluminator. from my understanding, it will handle 700-750 hp all day long. not sure what boost level that is, would depend on s/c setup. id would think it would take 15psi easy.
the other option is to either rebuild yours or find a donor motor to rebuild.
if you dont want down time, you will need a complete motor to swap in. once you go that route, then you are looking at heads, oil pan, timing cover and all that crap to complete it.
if thats the case, id go for rebuilding a donor motor as you can get a nice one for about $1,500.00 that will have all the parts. if you have to hunt down heads, timing cover and timing set and all that stuff for your FRPP block, its gonna be expensive.
if you are buying a shortblock and having everything on your car "switched over" (for lack of better term) then id go FRPP.
and if you found one for under $3500.00, grab it before the suckers change their minds. its $3800 to $3900 everywhere ive seen it. of course that includes shipping too which is probably worth a couple of bills.
2006 Tungsten GT 5 speed -Hurst | C & L CAI, | Predator running 91 torque tune (91 race for track)-BAMA. | MAC Boomtubes | FRPP 4.10s|Kaenan 3in cowl hood.
2006 F150 Supercrew Lariat 4x4 Black- 5.4, Hellbent Steel 2.5 level with 35x12.5x20 toyo m/ts on blk XD Hoss wheels, roll up tonneau, Gotts CAI, predator 91 performance tune.
Wifes Ride: 2013 Explorer XLT 2.0 Ecoboost. Stock as stock can be, but hey... on the bright side... she has a turbo!