F-Body LT1's were all two-bolt mains.
Doing a stroker kit is a great option, and relatively cheap. I've seen decent stroker kits on eBay going for like $1400-1500 - Eagle 4340 crank and 4340 rods, forged pistons (JE, Ross even etc...). 4340 steel is widely regarded as the best type of forged metal but there's a lot of engine builders out there that will argue a good cast crank will do you better. But whatever.
Just remember you want the build the strongest and lightest rotating assembly possible. Thats usually the difference between price - you can have two forged 4340 cranks: the $500 one will weigh over 50 lbs and the $1,500 one will weigh under 40 lbs.