Deciding on replacement intake (318, details in post)

Dan the man said
Do you use the 5.9 heads or non magnum heads? I understand about flow but how much does the compression loss cost in performance

thay talking j heads the magnum head was used on both 5.9 and 5.2s with a 59ish cc chamber, probably closer to 62ish!! after a .040 cut the j's come in around 65ish depending on how far off factory was to there own specs! what lil compression is lost is not noticeable, better cylinder filling by better heads might not lose a .01 of compression at rpm!

Dan the man said
Why does it seem like everyone what's to put 360 heads on their 318's? I asked these because they drop the compression off unless you have them milled like 0.070" and that has to cause port alignment issues also wouldn't that affect the push rod length? Just asking as I don't know these things as a fact or from personal experience.

cause it works!!! any alignment of the ports can be fixed with gasket matching! .040 off the heads ant much, and with adjustable rockers is a non issue, with hydraulic lifters it ant nuff to worry over ether! better flowing heads will always make better power!