This what you referring to?
MMR 5.4 Street Mod 1000 (up to 900HP) 2V, 3V or 4V
*Cast Iron 5.4. Block Block , torque plate bored and Honed
*New 4340 Forged 4.165 stroke Crankshaft w/micro polished journals at no extra charge
*New 4340 6.658 Manley H-beam Rods ( These US made rods are shotpeened, magnafluxed and weight matched to bring you the finest H-beam rod available for your 5.4
*New Forged Manley pistons (High or low compression)
*Total Seal file fit rings (precision file fit to your application, nitrous, blower, turbo or N/A)
*Clevite Rod and Main bearings
*Complete Pro Assembly and Balancing for the smoothest, highest revving shortblock available, Pre-Lubricated with Royal Purple Assembly Lube and spin tested. Lastly 3 technicians sign off on your new engine prior to packaging and crating.
Upgrade to 2011 GT500 Alloy block + $2499
Coated Pistons (ceramic dome/teflon skirt) $399.99
MMR Street/Racing Oil Pump (highly recommended) + $159.99
MMR/Felpro Extreme Duty Headgaskets + $169.99
ARP Headstuds +$289.99
ARP Mainstuds (recommended for 600+HP) + $189.99
ARP Main Cap Side bolt kit $79.99
MMR windage tray and hardware kit (+15HP) + $129.99
like I said I don't know much at all about blocks, I definitely need help on picking the right one. I need something light, able to handle the mods I want and room for upgrading in the future.