If i were doing a serious N/A 4v build here is what i would do assuming this would not see street use or very little street use and smog/emissions were not an issue
-Aluminum block, doesnt matter which one they all work without boost
-Darton MID sleeves bored to 3.70", allows the valves to be unshrouded
-insert your fav forged rotating assembly using ARP rod bolts and highest compession i felt comfy with
-Jan 05 casting 4v cobra heads that were polished with a mild port
-Sean Hyland road race cams (sorry i like turning right and left)
-SHM stainless valves with titanium retainers and insert your fav brand springs, oversized valves if budget allowed
-ARP main and head studs
-Dry sump oiling system with remote dual filter and largest cooler i could find along with a 5 gallon sump mounted behind the drivers seat as in NASCAR
-Livernois block drain kit
-Piston tops, skirts, rods, crank and crankcase would be coated with either a heat resistent or oil shedding coating
-Intake and Exhaust ports would be coated
-Whatever that cooling kit is called this week that punches out the core plug on the back of the drivers head and connects it with the heater line on the back of the head. (durability kids)
-Biggest radiator i could find that fit and didnt leak
-Canton coolant reservoir, metal does not leak like plastic
-Sheetmetal intake or else the Grand-Am intake if i could find one and get the IMRC working
-Dual or triple plate clutch preferably Tilton since they are just up the road from me
-Ideally a Hollinger 6 speed if i could get a bellhousing to work, they allow for WOT upshifts and resist left foot braking damage as that is my preferred method of driving.
-Factory coils (yes kiddies they are cheap and work)
-Largest diameter long tube headers with offroad X pipe and your fav brand mufflers, personally
Borla Stinger routed through the pass door like a proper touring saloon.
-Torsen T2-R diff with 31 Spline axles and 3.73 or 4.10 gears with a diff cooler assy. If you use a Mocal t-stat and a Terminator heat exchanger you can have a pretty cool diff cooler for cheap.
-insert your fav large brakes from Willwood,
Brembo, Alcon, AP Racing, Performance Friction, Carbon Industrie and your fav
suspension setup with a cage and proper seats and there you have a fun little track toy.