Arrington K1 426 short block

Bore is 4.080/stroke 4.080
Compression is 10.3-1 with a 72.4cc chamber head
4340 Steel Crankshaft with Clevite Main and Rod Bearings
Arrington molly filled piston rings
K-1 H Beam Bushed Connecting Rods w/ARP2000 Rod Bolts
Wrist Pins and Locks
ARP Main Studs
Pro-Gram Billet Main Caps
Stock Shot Peened Main Bearing Caps
Dura Bond Cam Bearings
High RPM Oil System
Remove all flashing, chamfer all 90deg corners
Radius bottom of all cylinder bores
.0625" chamfer radius throughout oil system
MicroPolish bearing surfaces(including wrist pins)
Micrometer measurements of all bearing surfaces; hand match individual bearings to journals maintaining .0001" tolerance.
Sonic checked cylinder bores
Hand Chase Threads
Hand Clearance for Stroker Assembly

This engine is a NASCAR grade machined, assembled and finished by Arrington Engines.