Just get a 4 bolt main. Don't fool with a "conversion".
I don't know what labor is worth in your area, but there's several hours of work to line bore and hone a block, plus the cost of new main caps. Probably at least $400-$500.
2 bolt or 4 bolt main?? is it stock??
As much as you like if you can afford it when it breaks
the hell if i kno
12.4 million
depends on if it is a 2 of a 4 bolt main
To make the conversion, we'd have to know both units.
300
Advertised Horsepower is--165HP @ 3800 RPMs.
If it's not cracked and is still stock bore, About $ 125.00
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.
200 hp. 300 ft/lbs torque.
A metric conversion calculator can make the comparison between metric and U.S. Standard units much easier to understand and much faster than doing the work by hand.