These guys will get you going, give them a call.

HALLAM BOYZ PTY LTD. 255 GHERANG ROAD, Modewarre, 3240. VIC, Australia Email : Email Website : Contact Person : Paul Phone : (03) 5266 1336 ...
 

Couple of things you could do
Buy in 95" Barrels or get your barrels bored & SE flat tops.
Go to 98" & get your barrels bored with Wiseco or CP pistons
Throw in some Andrews 37's or some woods 6 cams (98" & Andrews 37's you will need comp. releases)
As previosly been posted get hallam boyz to do some heads up for you or you could get some heads done up from the US.
Without headwork you would net approx. low 90's in TQ & low 80's in HP with either one of these combo's.
With headwork easily join the 100/100 club