I have decided to offer a Forged 6.1 shortblock to go along with the release of my Twin Turbo kits in August. Arrington has spected this block to handle 1200 RWHP!! 1. Arrington Forged 6.1 shortblock 2. Mahle 2618 material Pistons 3. Billet mains 4. Oliver rods 5. ARP head studs 6. Manley Forged Crankshaft Pm for pricing and details. 4-6 weeks for delivery $2500 deposit will be required with order