I have an eagle 5.7 intake on my 6.1, you have to mod the intake some on the bottom as it hits the block in front. The ports are different on the earlier 5.7 intakes.

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