Am I better off getting a GSR transmission and swapping the LS 5th into or using my LS housing and putting in a GSR 3rd and 4th?

my car is a turbo LS-V, only making 400. i would like to go for more later, but its just a street car. i may take it to the track here and there. i have read numerous threads about GSR vs LS for boost. my conclusion to all them is a GSR with the LS 5th. but i would like to know if all gears are interchangeable and if i will run into any issues?

also if i am using an LS 5th, am i to buy an LSD for the LS or GSR? thanks

 

GS-R with LS 5th.

 

as for the LSD....the LS are cheaper than the GSR, but which one am I supposed to buy?

if i have an LS now, could i just swap over the GSR 1-4, right?

 

The LSD will need to match the FD you are using. The LS has a longer 4.266 ratio FD and the GSR has a 4.40 ratio. You are better off getting a GSR transmission and putting LS 5th gears and a LSD in it. You can use the two 5th gears from your LS transmission if they are in good shape.

 

thanks. i was actually going to call you guys if no one chimed in. i may need to pick some stuff up from you.