I have a police car LT1 block. Is it a 2 bolt main or a 4 bolt main.
I plan on getting 600HP out of it, and if it is 2 bolt main can it handle this hp and big nitrous sprays.
Please Help

 

All the sources I can find say only the Corvettes had the 4-bolt, and that the 9C1 Caprice was not an exception.

I will leave your other question to those with more experience.

 

From what I understand the corvette and replacement lt1 motors from GM were 4 bolt. I have a B4C "specail service package" Wich is basicly a discounted z28 with camaro bages instead of z28 badges that GM gave for Law enforcement.

 

The blocks were no different than any other ones. I would assume you are going to be tearing it down before performing mods to get it to 600 hp, so you will find out if it is 2 or 4 bolt mains.

 

I would be shocked & surprised if it was anything other than a 2-bolt main.

As to what it will handle, that is more dependant on block prep than bolt numbers. You CAN get it converted to a 4-bolt setup, and if you do you should choose a splayed setup.

However, if you do a GOOD block prep and use studs, you shouldn't have any problem at all with 600hp and 7000+ rpm.

In addition to doing good block prep, which means a line bore and fine tuning your oil system, you also want a high quality crank. At the 600hp level you should look carefully at the Callies Dragonslayer. Howards has some PM rods for $599 that are only 585 grams and support 800hp. Balancing is prehaps the most important, and use a high quality balancer/damper.

Beyond that, the single most important thing you can do is to watch your DCR so that you stay out of detonation. Even a poorly done bottom end will tolerate a lot of rpm and power as long as you don't get into detonation.
The best bottom end in the world won't survive detonation for long.

 

How much does it cost to prep the block
How much does it cost to convert to a 4bolt main