well playing some big games then drop you watches 
as you are doing it for first time, a professional guy can complete it in day one or two, rest changing dual vtec to single, you need to play with IACV, maps, injector wires, and distributor harness, dual vtec had HF4 I.A on other side single one have small one, Vtec pressure switch and last o2 sensor, then you must need to chip you ecu., if you need power then get single vtec head, single layer gasket, you will let first low compression then boost that ***** with p08
