If you are interested in getting to the other end of the track the quickest and want to continue to use your 360-2 230 cc Indys, there was a combo that was well documented on here and was the fastest 230 cc combo I have ever seen or heard about. I believe the car was an early 70s dart swinger owned by John Pennington. It had a 4.07 bore,Scat 4" crank, Eagle 6.123 H beams,stock block,nothing trick about the short block at all. (no chevy rods,light weight pins or trick ring pack) The heads had 2.15 Ferea intake valves installed and valve job and port and chamber work to take advantage of the larger valves. It had an Indy intake that was port matched and had some minor plenum mods. The cam was an Indy spec cam 279/279 @.50 .680/.680 108 LSA installed at 108. Chambers were 63cc and compression was at 13.5 with an off the shelf piston. Off the shelf wet sump oil pan,vacuum pump,1000 Race Demon Carb,2" Hedman Husler headers,727 with a mid 5000 converter. At 3100# this combo went 9.20s to 9.30s at more than 142 mph. I saw this car run in 2005 and still have not heard of any Indy 360-2 230 that was faster at that weight. As said before I think you would be better off staying with the 4" crank,more compression and focusing on getting the head and cam combo to work better.