Magnum, Magnum R/Ts

I've been looking at the LA replacement ones, but they run kind of expensive. (atleast where i was looking) Seems like I can find a nice pair of aluminum ones for near the same price.

EDIT

I forgot to mention I will be most likely building a 408-414 with a 360 block.
Heres the little list of things I've compiled:

p5007950 LA Replacement Cylinder Heads
p4529220AB Hydraulic Tappets
p5007477 Hydraulic Pushrods
p4452032 Chrome Moly Retainers
p5249464 Valvesprings
p5249878 Intake Valves

It seems I should be able to use the stock magnum exhaust valves, rocker arms, valve locks, and valve seals. Thats what I'd need for the Replacement heads, not 100% sure about what more I'd need if I just used regular magnums. This runs around $1300 bucks from what I've seen online.