I have a set of GT40P heads and after doing research i see the 3 main problems are Headers, Valve Springs(with aftermarket cams) , and pushrod length.. The motor i have has a custom grind lunati cam in it along with 1.6 rockers... So i want to know what valve springs i need to get to prevent valve float or spring bind withough doing machine work to the head (pretty much just take the old ones out and put the new ones in if possible... Also i read the the stock pushrods are a hair to short for the gt40p's so the valves dont open all the way up.. Does anyone know what pushrods i need to get for them as well??