Generally speaking, Components have an: A) “I can do this forever” happy spot; B) “I can only do this for so long...” tolerance, and a C) “l quit!” As it applies to our IDI engines and old Ford trucks, What have you experienced/read/heard? Some of the IDI components I personally haven’t heard of breaking from raw power: the crank, block, pistons.. Perhaps that will change now that Wes is getting 400cc+ out of the DB2 fuel pump So, what are some approximate “max capable” or “max recommended” power levels where we will need to start beefing specific things up? Some obvious starting places: Head gaskets, with and w/o studs. Connecting rods: n/a, turbo rods and psd (diesel world mag said 6-650 for forged psd rods). E4OD, what mods have you done? Clutches, which ones have you tried? Driveshaft, when upgrade? To what? What components would you start with?