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Product Summary

377, 400, 421, 434

  • Engineered to accept OEM roller rockers and cams
  • The decks are parallel within .002" and has 350 main journals
  • Block is cast from high nickel iron and has a priority main oiling system
  • Designed for high-performance and heavy-duty applications producing up to 600 horsepower
  • The ideal starting point for hot rodders, drag racers, circle track competitors, off-roaders, and high-performance marine enthusiasts

Key Specs

BrandDart

Need To Know

Truck Ship

Truck shipments must be pre-paid with a credit card, certified check or money order

Quick and Easy Returns

Return Policy

Details

Dart's Special High Performance (SHP) small-block meets the need for an affordable, precision-machined cast-iron block with superior features. Designed for high-performance and heavy-duty applications producing up to 600 horsepower, the SHP block is the ideal starting point for hot rodders, drag racers, circle track competitors, off-roaders, and high-performance marine enthusiasts. The SHP block as all the features needed without spending the big bucks and having to wait on your machine shop.

  • All new, precision machined
  • Cast from high nickel iron
  • Priority main oiling system
  • Siamese 4.125" bores
  • At 4.165" bore, .230" wall thickness
  • Clearance for 3.75" stroke w/ steel rods
  • Decks parallel within .002"
  • Made in USA
  • Blind head bolt holes
  • 350 main journals
  • Splayed 4-bolt center main caps
  • Two piece rear main seal
  • Accepts OEM roller rockers and cams
  • Uses 1981-85 oil pans & dipsticks
  • Accepts standard starters and bellhousings

Charts

Specs

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Specifications

KEY SPECS
BrandDart