The LT1's have pulled pretty close to the LS1's recently. I would hardly compare a FAST 90/90 with an LT4. A 90/90 setup runs over $1,000. It's worth 20 hp but is expensive. Other than the intake they are close in HP and price for upgrades. The LS1 block will save you some weight off the nose and has 6 bolt mains vs. 2 bolts for LT1. |