I have done all the upper end work to mine as well. I hope you like a steady tick from the DOA cams <img src="/forums/images/graemlins/frown.gif" alt="" /> . I ran just dino oil in mine for about 2k miles then changed to synthetic. Im also running the stock bottom end with 175k on it though. I would be very intrested in checking out your results when your done to see what kinda difference the complete bottm end makes over just doing the top end like I did. Here are some shots of the intake mods I did.







My next mod will either be sectioning my intake to port the runners or just boring my throttle body for now. Here is what I have done with my upper and lower intakes.

My upper....

My lower....

And finally the transition between the 2 as thay are assembled upside down on my work bench...


this last one is difficult to see but if you look down the bore you can see the clean transition between the upper and lower. I have an extra upper intake on my extra motor that Im considering cutting the plenum off and porting each runner to a given size then welding the plenium back on to see what kinda gains can be obtained from intake mods. I Tend to think the real limiting factor on the 3.0 seems to be the exhaust valves. You can clearly see the seat being much smaller than the exhaust bowl area and most places only offer 1mm over sized valves that use a stock seat for what would seem to me like no performance gain but maybe some gain in heat dissipation.

Im really trying to get some talk going about 3.0 performanc but most people just want to talk about how much it sucks and wont give any specifics why. I cant for the life of me figure out why it wont make any power? Is it the intake? the Exh valves? the ECU? lack of cam options? you simply dont need a 4 valve head to make power as other threads on other boards have suggested just have a look at the gains made with a run of the mill chevy 350 using a 2 valve head.