"Thanks Dr. J for the Airpack, it helped get some serious HP from the Magnum. The full story on the engine is in  Engine Masters Magazine." - Steve Dulcich

DYNO RESULTS Mopar 408 Magnum Stroker SuperFlow 901 Engine Dyno

STP Correction Factor Tested at Westech

RPM   TORQUE   HORSEPOWER
3200   491      299
3400   495      321
3600   496      340
3800   508      368
4000   509      388
4200   517      414
4400   522      438
4600   529      463
4800   532      486
4900   533      497
5000   532      506
5200   528      523
5400   522      537
5600   513      547
5800   501      553
6000   484      553
6100   477      554
6200   468      552  

Ken Johnson Built 427 Chevy with Dr J's Performance Intake

  "After months of work (mainly waiting for some parts), the new engine is now built. This will replace the deceased 383 in the '69. Enormous thanks to Engine Masters competitor W.O.T. Inc. for the great job. Also thanks going to Bryce at Dr. J's for his excellent manifold porting." Ken Johnson Some

quick specs

Heads - AFR 210 Eliminators, competition ported, 2.08/1.60
Block - Chevy Bow Tie, w/roller cam bearings.

Disp. - 427" (4.185 bore x 3.875 stroke, = 426.4 cubes)
Pistons - JE Aluminum 2618 extra lite, 10.4 C.R.
Rods - Eagle
Intake - World Motown, full porting and matched to AFR 210's
Oil Pan- Milodon #30908, stroker low profile, 6 qts. + filter
Rockers - T&D Shaft, 1.6 int./1.5 exh.
Carb - Quick Fuel (Holley) 950
Cam - Custom (Specs confidential, but I can say that it is a solid roller
of 240/245 duration @ .050, with 4-7 swap).

See Dyno Test 

Morgan 410 Small Block Chevy

Engine Specks

410 Cubic inches
Bore 4.145
Sroke 3.80 Ohio Crankshaft 4340

• Dyno Sheet