I may just skip the Magnum heads.
The LA deck being .019 taller would barely affect compression enough to matter to the pistons. The decks could be resurfaced to match a Magmum anyway.
Thanks guys!
the benefits of the magnum head: closed chamber, good squish characteristics, fairly decent flow for what it is if you keep the cam reasonable enough to take advantage of that aspect. 1.6 rockers, updated valves & hardware over the 360 stuff.
if the 360 heads needed any work and the mag heads were more ready to run or needed less $$ to get them on there i would say they would be the better choice-- depending on the nature of the build.
(edit: because evidently i forget what rocker ratio magnums are)