yes the cylinder heads you sellect does matter

[grumpyvette]

Head flow & results on a 383


CHEVY high performance mag for aug 2006 did an interesting comparison between eight different cylinder heads available for $1000 or less.
While youll need to read the article to get all the data, I found it very interesting.
The articles called

“ POWER CURVES”
and it starts on pg 22
http://www.chevyhiperformance.com/toc/ch_toc/index.html

Heres a few differant different articles
http://chevyhiperformance.com/tech/engines_drivetrain/cams_heads_valvetrain/0601ch_head/

http://chevyhiperformance.com/techarticles/148_0401_imp/

http://chevyhiperformance.com/techarticles/41598/

http://chevyhiperformance.com/techarticles/97538/

http://chevyhiperformance.com/techarticles/83858/

http://chevyhiperformance.com/techarticles/148_0506_thunder/

http://www.chevyhiperformance.com/techarticles/93863/index2.html

the main factors you should notice is that ENGINE DISPLACEMENT MATTER TO THE RESULTS, port size(cc)IE the difference between a 175cc to a 230cc) has far LESS effect on the power curve and peak power that the AIR FLOW, and that flow rates measured at lifts above where the CAM reaches its max lift, and has little to no effect on the power curve, the cams duration and lift and LCA effect the results, the combustion chamber design and valve size DOES matter.
And the intake and exhaust design and flow rates DO EFFECT the power curve.