"K" code heads
 

i was wondering if anyone knew if there was that big of differance between the orignal 2bbl heads and the 4bbl ones. if there is that big of differance what price should i be looking at for some? i planned of getting them ported after but also wondering if everything would work from the 2bbl to the 4bbl such as the valves and lifters and all that stuff. Also any cam suggestions are welcomed. Thanks