[Will]

Combo #1 - 406

'72 400 block +.030, dished forged pistons, stock rods with ARP bolts, balanced.

'70 # 13 heads with a 5-angle valve job followed by bowl blending and gasket matching. Stock rocker arms. CR 9.25:1

Comp XE274 cam, Performer intake, Buick 800 Q-jet, HEI distributor, HO Racing Tri-Y headers, Flowmaster 2.5" exhaust, Dr. Gas X-pipe.

Engine inhaled through factory Ram Air setup in my 3840 lb race weight '72 Formula with 3.23 rear gears, TH400 with Coan pro-street 3000 stall converter.

Best ET of 13.60 @ 102 with a lousy 2.0 60' on street tires. Typical ETs of 13.70-13.80 @ 101

Combo #2 - 440 ci

'70 455 block, +.035", '69 428 crank, Eagle rods, Ross dished pistons.

'67 #061 heads ported by Dave Bisschop @ SD Performance to 273 cfm intake/200 exhaust. Harland Sharp 1.72 ratio rockers. CR 9.6:1.

Old Crane solid roller cam with specs similar to RAIV cam - 232/244 @ .050", 113 LSA, 109 ICL, .335" lobe lift (These are very mild specs for a solid roller!) Crower lifters.

All other components same as combo 1.

Chassis dyno showed 344 horsepower (can't remember torque), so close to 425 at the flywheel. Best ET of 12.66 @ 108 with a 1.66 60' on street tires with two main bearings showing copper (engine tore down next day when oil filter analysis showed problems). Typical ETs of 12.70-ish @ 106 with 1.80 60'.