How did it get up on plane with the 270cam. Was it on the edge or do you feel like if you went with a larger can it would still be OK.

With 10:1 compression you should be more than ok with the 278 cam. It would have great lopy sound with good exhaust. Should be mentioned this cam is most happy with good exhaust. Your heads and cubic in. are just good enough for the 278 also. The question that you need to answer is (like some else mentioned) how do you use it? Idle a lot? Then the more efficient 270 will more likely be better. Like hammering it once in a while with top speed being very important, than bigger is better. Your choice.

Sounds like the 270 would be my best bet. Especially because my exhaust system is slightly better than stock. I mostly cruise and hammer it once in a while. Some idling too ay the local gathering spots... it may be marginal differnce uptop anyway. Sounds like i cant go wrong. I also saw a video of a donzi with the 270 flat tappet and the idle tone was very acceptable... plenty of chop..

Still like the hydraulic roller conversion kit. Not sure what oil you run but most of today's oil's don't have enough zinc in it for a flat tappet cam to last.

X2 on the hydraulic roller. Brad Pitt has the ZDDP in their racing oil.

With out a doubt im goin to run zinc additive everytime oil change.. I wish roller was in the budget... Thankd gor the input guys.

Any good quality racing synthetic will work, or Rotella T 15/40 conventional diesel oil works well too.