you never have to do valves, unless your pulling the head completely.Originally Posted by Mangrum
You do not need springs, or retainers. the cams are bolt in, they are made to work with STOCK engines.
The setup i listed is capable of 200-215whp with the right internals. if you decide down the road to go with a built engine and do 12.5:1 pistons and rods, then you can make over 200whp easily.
if you do decide to want more, you can always go with more aggressive camshafts and go with valvesprings and retainers. the cams i listed (skunk2 stage 1s) are very mild, slightly more aggressive than ITR cams, an are great for stock motors.
what im basically trying to tell you is that for the budget you are talking about , thats the best setup.
If you decide to go into the engine, the header is fine, the intake manifold is fine, the intake is fine, the cams can support more power, but if you want to upgrade you can too.
I had a mid 200s whp NA LSVTEC and i had $9000 in the ENGINE meaning oil pan to valve cover
just to give you a rough estimate of what it takes to build an engine like that.