Dart Iron Eagle Engine Block Small Block Ford 4.125" Bore, 9.200" Deck Height, 351C Main
- Part# 31385295
- Material: Special RMR alloy
- Bore: 4.125” unfinished
- Bore & stroke: 4.185” x 4.250” max recommended
- Cam bearing bore ID: SVO 2.203”- 2.205”
- Cam bearings: Special coated, grooved, w/3 oil holes (Not included)
- Cam Bearing O.S. + .010”, +.020”, +.030”
- Cam bearing press: .002” - .003”
- Cam journal OD: Standard Ford SB
- Cam Plug: 2.375” dia. Cup plug
- Cylinder Wall Thickness: .250” min @ 4.185” bore
- Cubic inch: 468” max recommended
- Deck Height: 9.200”
- Deck Thickness: .675” min.
- Fuel Pump: Mechanical pump provision
- Freeze Plugs: STD Ford press in cup plugs 1.500” OD
- Head bolts: 1/2” Blind holes
- Lifter Bores: STD Ford .8747” - .8757” Honed to size
- Lifters: STD Ford - Hydraulic rollers need tie-bar style lifters.
- Main journal size: 351C (2.749”)
- Main bearing bore: 2.9415” - 2.9425” Honed to size
- Main thrust width: .913” - .915”
- Main Cap Bolts: #1 1/2” (2) 3/8” (2)
- #2, #3, #4 1/2” (2) 7/16” splayed (2)
- #5 1/2” (2) 3/8” (2)
- Main cap press: .003” - .004”
- Main caps: Steel - 4 bolt, all 5
- Main cap register: Deep stepped register on each side (no need for dowels)
- Oil system: STD Wet Sump or SVO dry sump
- Priority Main oiling with external pump (wet or dry)
- Oil Filter: Standard filter w/ adapter Dart PN# 32940000 (Sold separately)
- Oil Pan: Standard 351W oil pan (May require some modification for fitment)
- Rear Main Seal STD 1 piece seal - FelPro# 2921 or 2942 4.500”x 3.750” SVO
- Serial No. Right front & main caps
- Starter: Standard
- Stud & bolt holes, Head: 1/2” STD SVO with blind holes
- Timing chain/gears Standard components Note: (Late model 351W chain required)
- Timing Cover: Uses stock 351W timing cover
- Torque Specs: 1-5 1/2” bolts - 100 ft lbs
- 2-4 7/16” bolts - 65 ft lbs
- 1 & 5 3/8” bolts - 35 ft lbs
- Weight, approx: 190 lbs - 9.200”
Dart’s Iron blocks for Ford are designed to work with stock components, but are much more than a stock replacement.
Designed from the ground up for hard core racing, all the weaknesses of the factory castings have been addressed. Dart blocks are cast from premium high strength Iron with extra thick cylinder walls and decks. The main webs are beefed up and fitted with steel 4-bolt main caps.
FEATURES
- Siamesed cylinders: Standard 4.000” or 4.125” cylinders can be safely bored to 4.185” diameter, extra thick walls prevent cracking and improve ring seal.
- Extended cylinder barrels for improved piston support.
- Four deck heights: 8.200” (302), 8.700” (stroker 302), 9.200” (351C) and 9.500” (351W) allow increased displacements up to 468 cubic inches.
- Steel 4-bolt main bearing caps are standard. Three centre caps have splayed outer bolts for maximum strength.
- Two main bearing diameters: 302 (2.249”) or 351C (2.749”) allow choice of small or large journal crankshaft.
- Upgraded oiling system has been completely redesigned with a low restriction priority main oiling system with rear external oil pump feed.
- Reinforced head bolt bosses are blind tapped to prevent leaks and produce accurate torque readings. Extra thick decks prevent head gasket leaks.
- Parts kit included (PN 32000003)