New, break in time only. 446, (440 + .030) Mopar big block. Professionally built with American parts and complete documentation. 1971 block, OE forged steel crank, Clevite bearings, 440 Source forged rods, Sealed Power/TRW forged pistons with ARP rod bolts, Comp Cams hydraulic flat tappet cam, 231/237 duration @ .050 and .525"/.525" lift. Cam degreed to 106 intake centerline. '71 iron 906 heads with oversized 2.14 stainless steel intake valves, standard 1.74 stainless steel exhaust valves, competition valve job and nice street/strip bowl porting. Fel Pro gaskets. Motor is complete with Edelbrock RPM Performer intake, Holley 750 HP series vacuum carb, Pertronix Flame Thrower II distributor and MSD wires. 9.8 to 1 compression ratio. Motor is oil primed with Maxima break in oil and ready to install. My stupid phone deleted most of the build pics as I was copying them, so I used a borescope to show the porting work. Estimate 510-540 hp, about the same torque. Will deliver within 250 miles of Denver, or meet you at that distance for free. I can crate and ship on your dime if necessary. $11,500
Also TKO-600 conversion kit for BB Mopar to '70 Mopar E body. $3,000 or will sell both together for discount price.