one thing you have to keep in mind that someone brought up on another thread....Hp on paper is just that...you never know how your combo will react to certain heads...it could run like a bat out of hell with those 305's..could go to the 350+ and slow down...combo's are funny..many variables determine this outside of head size.
i am with superstreeter..my motor builder PAR said by going with the bb4x oval port head with the 2.357 valves with well over a 400 flow would pick me up approx 50 hp over my bb2x heads..... all for the low price of $4,000.......hmmmmm lets see 50hp vs 4,000 hard earned bucks (nowdays)
i stayed with my set up !..you couldn't feel 50hp in your pedal or your a$$. and probably couldn't see much difference on the board either.
i gues what i am trying to say is do not get caught up in the hype of what this stuff says on paper...ITS NOT REALITY.
Brian
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "