Why are some people making something out of nothing.
A simple head swap with the combo set up for a smaller head. And picking up over 100hp with a
NON PORTED HEAD!!!!!
John I think they stated just over 400 cfm. Not your 420 cfm.
OUT of the BOX with a slight touch up of the port under the valve area that a child could accomplish.
Now that Bob has a head that will flow bigger #'s, he can now get into the rest of the parts to make the <span class="ev_code_RED">'NEW'</span> top end work.
Was really suprised to hear that another
BIG change (not mentioned ) made no difference in hp numbers.
But then again it was designed for a lot bigger cam and such.
Great head for an out of the box 400cfm plus deal.
Outside the Pontiac world there is a very limited availability of aftermarket heads flowing that #, <span class="ev_code_RED">Out of the Box</span>.
And I know the quality control along with the assurance of quality will be better then the
Other current head that comes in just under 350 cfm 'OUT of the Box'.