Cast iron block with 4-bolt main caps and strengthened structural sections
Nodular iron main caps
Can be bored/stroked to produce 434 cu. in.
Siamese cylinder bores
Bore range from 4.000-4.060"
Dry sump oiling design
2.248" main journal diameter (stock 302 size)
Weighs approximately 190 lbs.
For professional competition
Semi-finished lifter bores and main bearing bores – must be honed to fit
Uses common OD cam bearings M-6261-J351/R351. See page 55
NOTE: Siamese blocks are solid casting between the cylinder bores. There are no water passages between them.This is done to increase the strength of the block.