DART Big M Billet Cap Race Block!
10.20 Deck, 4.250, 4.500 or 4.600 Bore
The finest Iron Block on the market! These blocks will support 3000hp!
We offer a FULL Line of DART Products and customized combo's (.903 lifters, fastner options, roller cams, ect.) please contact us if you have a specific need.
Material: Superior iron alloy
Bore: 4.250” & 4.500”
Bore & stroke: 4.625” x 4.750” max. recommended
Cam bearing bore ID: 2.1195” – 2.1205”
Cam bearings: Special coated, grooved, w/ 3 oil holes
Cam Bearing O.S. +.010”, +.020”, +.030”
Cam bearing press: .002”
Camshaft position: Standard
Cam Drive: Std Timing chain, Gear drive or Belt drive
Cam Plug: Standard BBC 2 7/32” (2.218”) dia.
Cubic inch: 632” max recommended
Cylinder Wall Thickness: .300” min @ 4.625” bore
Deck Height: 9.800” & 10.200”
Deck Thickness: Adequate for all applications
Fuel Pump: Mechanical pump provision
Fuel Pump Pushrod: Std BBC
Freeze Plugs: Press in cup plugs
Head Gasket: Fel-Pro# 1037, 1047 or 1067
Inner Head stud: 2 slotted bosses per side
Lifter Bores: BBC .8427” - .8437”
Lifter Galley: Raised .350” for longer lifter bore
Lifter type: Roller - Gen VI (+.300 longer), Solid – Mark IV
Main bearing size: Standard BBC
Main bearing bore: 2.937” – 2.938”
Main caps: Steel Billet or Ductile Iron (sportsman) - 4 bolt, all
Main cap register: Deep stepped register on each side (No need for dowels)
Main cap press: .005”
Main cap Bolts: All 1/2”, #2, #3, #4 have splayed outer bolts
Oil system: Wet or Dry Sump - Main Priority Oiling
Oil Galley, main: Stepped, 9/16” - 1/2” - 7/16”
Oil Galley, filter-main: 5/8”
Oil Filter: Stock Oil Filter location
Oil Pan: S tandard pan bolt pattern, extra bolt holes provided for strokers
Rear Main Seal: Std 2 pc seal / Fel-Pro# 2918
Rear Main thrust width: 1.622”- 1.624”
Serial Number: On main caps
Starter: Mounts in standard location
Stud holes, Head: Blind holes
Timing chain/gears: Standard
Timing Cover: Stock cover
Torque Specs: All 1/2” bolts - 105 lbs
Weight: 4.250” bore - 280 lb / 4.500” bore - 260 lb / 4.600” bore - 250 lb
This product was added to our catalog on Wednesday 19 January, 2005.