Welcome dude!
Aye as Ben says, weld diff, 13's, chop front springs and get 2" blocks, can get 2" drop springs and blocks from Classicswede on here.
Bin the viscous fan, Landrover 90 front shocks on the rear and uprate your 360's front shocks or refill with higher viscosity oil.
I've got a B19 360, open diff ATM but slightly damp/greasy roads and she will go slideways all day. No shortage on power either although most is due to open diff.
The 2" drop makes them handle so much better and allows for longer slides as the comedy suspension is not soaking up all of your momentum! lol
Hydraulic handbrake would be a good move too as I'm sure you're aware - and fixed buckets as the standard seats have zero bolster support and chuck you around soemthing chronic during spirited driving lol
Lastly - stick some pics up and don't crash it!
**EDIT 2" drop killed the body roll

Gay little clip from my private road.
http://s154.photobucket.com/albums/s247 ... V01161.flv