[scallywag]

Well if you are not going to do any block work and boost the stock block, then I say go with the b18b ls motor. But if you have enought money to get say new pistons, and rods..etc. then I say go with the b18c1 gsr motor! What is you power goal? A stock ls block boosted at 10psi with a kit can make 250whp, and the ls block can easily handle 12psi. It also comes down to budget, the cheapest would be go ls turbo, but if you got the cash for the more expensive motor, and you can dump money into rods and pistons, then gsr motor is deff. my pic.