IMO - Required: HRP brackets ($50 - $70), shock tower flo-rite ($20 -$30), side vents ($90 - $170, bar riser ($40 @ Ole's), shift assist ($30), no-snows/snow cleats/fastlanes for running boards ($100 - $150), get the oil ratio right (free unless you go too far and burn it down). Almost required: Boss seat ($400 used to $600 new), 10.4" clutch w/046 belt ($180 - $300 depending on how you do it), anti-stab kit ($90). Things I think are needed but I don't have yet: Powerclaw track ($575 - $650), two wheel kit (~$30), 09 type bumper ($200 - $500 depending). Titanium springs are good, came with my sled so don't know if they are worth buying. Get the clutching right. Depending on how you approach it could be less than $100 to $400 if you go to a torsional.