what to do with a 68cc head 350 pontiac. using unported heads with 1.92 x 1.66 valves. a performer rpm manifold. predator 930 cfm carb. 1.5 ratio roller rockers. 6.8" long bb chevy type con rods bused for LS1 wrist pins. 3.93" bore using  over LS1 chevy small block flat top pistons. 4.50" stroke crank. a gear driven solid roller cam from comp cams, #51-751-9 with specs of... 244 degrees duration at 50, 110 degrees LSA, 0.550" gross lift. block decked to 10.24", a 0.051" thick head gasket. 12 to 1 compression ratio. burns 87 octane fuel AND water/methanol from a snow performance injector. comp cams CAMQUEST6 cam picker dyno-sim predicts.... 455 horses @5,000 rpm, 551 LBS. FT. @2,500 rpms using large tube headers and mufflers.
The LS1 is not a small block chevy. It is a GM engine that GM powertrains designed to replace the small block chevy.
That stroker is something for an experienced engine builder or someone with deep pockets, to build this assortment of parts and make it all work is a bold step with 12.5 squeeze.,. I'm not altogether sure if all those pieces would even play well together, besides.,. why bother, when Butler sells components to build a variety of big cube Pontiac engines, with little or no fuss.
When The Flag Drops.,. The Bull ***t Stops.,. P. Engineer, Engine Builder
Drop it into a Camaro--Firebird mounts will do the trick. Gear appropriately.Relatively small bore, lotsa stroke--most new engines are designed like this, to reduce detonation while creating that all-important torque. The LS1 makes its power with a small bore by having such tall, skinny ports to get the airflow numbers up.
Just because you can't do it...doesn't mean its impossible