RE: Hellfire engine in Savage
I say the F4.6 is better than the k4.6, ive had both. The f4.6 has more balls (not much more). Both are low level engines but are ok for a savage/hellfire. I had a k4.6 in my hellfire and it lasted ages, easy to tune, pullstart was crap (went to bump box). Id install the k4.6 as u said as after a while u might want to upgrade, then u could sell the f4.6 new and get more $ for the upgraded mill like a lrp 28 or picco.