Cam base circle is different on the earlier and eagle 5.7s. You'll need different length pushrods. I'm sure you can find the right length searching on google.

68 Road Runner, 69 Belvedere, 71 Challenger Vert
340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z
66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram