Call your local machine shop....only they can tell you their price to drill and tap the block. You'll also have the cost of the 4 bolt main caps, bolts or studs, and to align hone the block with the new caps. Unless you are planning on turning 6,000 RPM plus on a regular basis you really don't need 4 bolt mains on a street vehicle.
usually
Yes you can. It's a fairly expensive process which requires complete disassembly of the engine so that the block can be presented to a machine shop. Consult a professional to see if this is a cost effective upgrade for your application.
Yes
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.
If it is a 1/2 ton. NO they all had a 2-bolt main engine in them. Now if it is a 3/4 or 1 ton truck then the odds of it being a 4 bolt main engine is about 100%
A real LT-1 had a four bolt main block.
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 ?
In 1994, General Motors did not offer a four-bolt main engine in their standard production vehicles. Most of their small-block V8 engines, like the popular 350, typically came with two-bolt main caps. However, four-bolt main configurations were available in performance and heavy-duty applications, primarily in the Chevrolet small-block engines, but they were not common in regular passenger vehicles during that model year.
The primary difference between a two-bolt and a four-bolt 350 refers to the engine block's design, specifically the number of main bearing bolts used to secure the crankshaft. A two-bolt 350 has two bolts per main bearing cap, while a four-bolt 350 has an additional set of bolts, providing greater strength and stability. This makes the four-bolt version more suitable for high-performance applications, as it can better withstand increased stress and power. Overall, the four-bolt design enhances durability and performance potential in demanding conditions.
To identify a 350 cubic inch engine with a 4-bolt main, you can look at the engine block's casting numbers, typically found on the driver's side rear of the engine, near the bellhousing. The casting number will indicate the engine's displacement and production year. Additionally, you can check for a stamped engine code on the front of the block, which often includes a letter and number sequence to verify the engine's specifications. A 4-bolt main engine typically has four bolts securing the main cap to the block, which is a distinguishing feature compared to 2-bolt mains.
both. in the earlier days the two barrel models were usually two bolt main and the 4 barrel models were four bolt main, but even that wasn't necessarily so.
The various parts of a stroke engine basically work in unison in converting the thermal energy to mechanical energy.