Your combo is close to mine, except I have the K.B. Hyper. pistons. The LD 340 intake is a good one. I currently am using the Air Gap. I have nothing but praise for the MP 284 cam. I used it with 3.91 gears and a Holley 750 DP. It really had strong mid range power, and good street manners, with a nice sounding idle.
I got greedy after a couple of seasons, and moved up to the MP 292/508. That was a expensive lesson for me. I wound up having to raise the compression and buying a much looser converter. The car currently has 4.30 gears in it, and gets occasional street use. It usually runs about a 7.60 in the eighth. Good luck with yours.