Correct exh manifold #'s for 70 340 Cuda??

[VitaminCuda]

I was told by a friend to look for 2863549 rt and 3418623 lt for my 70 Cuda. I was able to locate the 2863549 but the seller only has a 2863553 which looks correct, but considering the high cost of these parts I'd like to ask any experts before I pull the trigger. So, can this left side, 2863553 be a correct application? Was my buddy correct with the 3418623 referral?
Thanks

[sprecks]

According to Govier's white books, the correct LH manifold is 2863549, the RH one is 2863553. Looks like you have located the right manifolds to me. Buy em.

[VitaminCuda]

Thanks very much for the help