It sure is ....i just purchased a donor block for my 98 silverado and sure enough it was a 4 bolt main block
200 hp. 300 ft/lbs torque.
4 bolt main
My crew cab long bed 4x4 dually with in bed tool box and 55 gal main tank weighs in right at 7500lbs
Lol Bolt. Bolt is the main character. He's the white dog.
To tell if your engine is a 2 bolt main or a 4 bolt main. Turn the engine upside down on an engine stand. Next, count the number of bolts on each main bearing cap. if there are two, then its a 2 bolt main. And if there are4, then its a 4 bolt main. This applies to the three center caps. The front and rear are always 2 bolt.
1500--2 bolt, 2500 4 bolt
no cause a 4 bolt main has 2 extra bolts on each main
The difference between a 2 bolt main and 4 bolt main is how many bolts hold the caps that hold on the crankshaft. (A 2 bolt main has 2 bolts to every cap and the 4 bolt main has 4 bolts to every cap) A 2 bolt main should be able to handle 500hp as long as you don't push it above 5500RPMs.
4 bolt their stronger better lasting
None. The four bolt main block is thought to be more rigid at higher loads.
can be both ,i have a 350 010 2bolt main