An all-out racing version should be able to get in the 600-700 range.
It depends on what it came out of. least 165 most 190.
On a motor 4- bolt or 2-bolt refers to how many bolts are on the main cap what holds the crack. when it comes down to it if your not putting a supercharger on the motor or making to a performers engine, you don't really need a 4-bolt main An 89 would probably have the dipstick below #6. It would most likely be a 4 bolt main, but not guaranteed.
There are many different versions of that engine ranging from 145 hp to 205 hp.
190hp
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.
210hp
335 hp
4 bolts should be holding the engine to the engine stand.
20 draft horses were used to pull the 15 ton main anchor.
Go with most any GM small block, you can go bigger of course but that will require some major work. i.e. engine mounts, front suspenstion and transmission with a combination of many other little thingsGeneral Engine Block SpecificationsWhile 6 different bore size blocks have been produced, the small block engine can be classified into 3 bore sizes and 3 main bearing sizes. 283 blocks (3.875" bore, 2.3" main), 302/327/350 blocks (4" bore, 2.3" or 2.45" mains), and 400 blocks (4.126", 2.65" mains). In 1968 the main bearing saddles were increased in size from 2.3" to 2.45".CIDYearBoreMain Cap26219753.6712 bolt ONLY2671979 - 813.5002 bolt ONLY3051976 - 963.7362 bolt ONLY3071968 - 733.8752 bolt ONLY3271968-694.001 (2.3" main)2 bolt3501968-884.001 (2.3" main)2 bolt26519944.001 (2.45" main)2 bolt3021968-694.001 (2.45" main)4 bolt3501968-964.001 (2.45" main)4 bolt4001970-724.126 (2.65" main)4 bolt4001973-804.126 (2.65" main)2 boltNotes: 2 bolt ONLY means just that,. otherwise 2 or 4 bolt can mean either design...
80 lb ft
Generally, you can't. GM installed both 2 and 4 bolt main caps on many different cylinder block castings. Now, some blocks were never offered with 4 bolt mains. Any low performance displacement (262,267, 305, 307, etc) always had 2 bolt mains. Small journal engines (pre-1969 chevy small blocks) typically had 2 bolt mains even on performance engines.