If you are asking if full roller rockers are worth it, then yes (even better if you go from the stock 1.5 to 1.6 ratio [with supporting mods, of course]). You won't know if you need an LT4 KM until you actually prove you have false knock. There is no need to buy another stock KM (if that is also what you are asking). The LT4 KM is pricey, now. I paid less than $20 from GM when I bought mine years ago.
Not getting easy to find. I bought one for that reason just in case later on in future builds I would need one. But thats just me, I'd rather have something and not need it than need it and not be able to get it lol.
When I bought mine there were 3 Ebay listings, now there are none
A forum community dedicated to all LS1 and LT1 powered vehicles owners and enthusiasts. Come join the discussion about performance, specs, builds, conversions, swaps, modifications, troubleshooting, maintenance, and more!