.060 is ok seeing that you already have them. The .030 over would be Nice it would let you do a rebuild Later on in life If?? you ever needed to With out any Questions. The 509 is a Nice and fair lift As long as the springs ARE NEW you should be just fine. NOW as for the Boss If you're not going to install the Lumps, You can save the few bucks and leave the boss in. But like any Hop up with Our L6s is THE Motor Needs to Breath and removing the Boss and Installing the Lumps even WITH Stock Valves Is a Very good Improvment over the Stock Head. AND That combo You have will Like this Impovement, even as a daily driver.
M# 3220 }[oooooo]
God doesn't like ugly.
