2 bolt 4 bolt
some of the later f-bodies got the leftover 4 bolts from the corvettes when they started putting ls1's in them. there may be a number in the vin that represents if it is a 2 or 4 bolt, but other than that just take the oil pan off and look. if its a 2 bolt it will have 2 bolts on the main caps, if its a 4 bolt it will have 4, if its an ls1 it will have 6.
By the time 4 bolts becomes genuinely a good idea you should be looking at aftermarket caps anyway and might as well go splayed so if anything a factory 4-bolt should be viewed as a NEGATIVE.
Factory 4 bolt blocks can be expensive. I sold one on eBay a while back and it went for $420. Like Grandpa Caprice said, you can convert to splayed caps for that kind of money.
