the starting point for countless racing engines. These iron blocks are available in a ... . Most of these blocks have siamesed cylinder walls 1 and four-bolt main caps 2 that ... . Bowtie blocks are called out by main journal sizes (i.e., 283, 350 or 400) ... by bore size (i.e., 283, 305, 350 or 400) if the bore is not standard to the ... main size. Example: #24502501 350 Main- 283 Bore size has standard 350 main ... for block 10051183) 0.900" thick main bearing bulkheads, Grade 8 main bolts ... Priority main oiling system Standard 9.025"deck ... height Cylinder bores have a nominal wall thickness of ... 0.340" 0.225" minimum cylinder bore wall thickness at 4.155" bore ( ... bolt holes for improved head gasket sealing Tall lifter bore blocks may require ...
One-Piece Rear Main Seal Race Block (front) GM PERFORMANCE PARTS ... feature full race-prep machining, 4-bolt splayed 4 main caps, and the very ... CNCd to +/-.001" machining tolerances! Cylinder decks, front and rear of case, oil pan ... the use of larger bearings Extra thick main bearing bulkhead machined at 5 Premium ... quality main studs SAE 8620 steel main bearing caps Billet wet sump rear main ... 0.210" to allow machining for the use 400 journal crankshafts Priority main ... oiling system 2-piece rear-main crankshafts pre-1986 oil pans required ... bolt holes for improved head gasket sealing Cylinder bores have a nominal wall ... thickness of .340" 0.225" min. cylinder bore wall thickness at 4.155" bore, ... valley oil scavenging boss behind cylinder #8 below bell housing flange is not ...