6 speed trans in an R5?

[Greaser Greg]

Is it a straight swap, and why would I want to? More top end? Closer ratios?

[m in sc]

adds a top gear. you need to swap the drum, shafts, gears, and the mechanism at the end of the shift shaft and all retainers, tops, pawls, etc. its NOT just the drum and shafts just fyi. its worth it if you are splitting the cases. OR, find a 350 complete bottom end and swap it.