[2_Liter_Turbo]

260 Duration Tomei Procams gave me a nice flat power curve to over 8,000RPM starting around 4,000RPM. 260 cams are perfect for 400 +/-50 whp SRs.

If you really want to build a bullet proof cylinder head, WPC the entire valve train (look up "WPC MotoIQ" in google if you don't know what it is). Solid lifters, dual guides, proper valve springs matched to the cams you choose, and your cylinder head should be solid. Just make sure you put a real nice surface finish on the deck surface (both block and head) for a good seal. Stock valves are fine. Deshroud a bit behind the valve seats for the most bang for the buck port work on a standard DET head.

Focus on cooling and oiling mods for reliability. Baffled oil pan, a good PCV setup, underdrive the water pump a little (if planning on revving the piss out of the engine), new OEM thermostat (don't buy aftermarket), new water pump, and all new hoses are a good investment as well. Before any machine work, buy a new front oil pump and send the gears out to WPC along with your valve train (pistons, rings, and bearings to WPC as well if you can swing it).