usually
Almost certainly would be a four bolt main block.
None. The four bolt main block is thought to be more rigid at higher loads.
There are no castings that were used exclusively for 4 bolt main applications.
Are you referring to the main caps? If you are some had two bolt mains, and some had four bolt mains.
The main bearing caps will have four ( 4 ) bolts instead of two ( 2 ) they will be side by side. A four bolt 350 engine is more common in the bigger truck series ?
Probably.
A 350 with four bolt main caps is known as the "double-oh ten block." The last four numbers on the casting are 0010.
1500--2 bolt, 2500 4 bolt
4
3970014 350 69-77 Pass,Chevelle,Camaro, Nova,Monte Carlo 2 or 4 bolt main 3970014 350 69-79 Truck 2 or 4 bolt main 3970014 350 72 Corvette late '72,200 HP,255 HP 4 bolt main
It is a small block Chevy 350 engine with 6 bolt main caps.