Roller Rockers 1.5 vs 1.6

Correction: Earlier, my search through Summit Racing didn't show anything available until August. Here are the solid cams that are "supposedly" available directly from supplier. I personally like 20-230-4 in a hot street build, but I don't remember the specifics of the rest of your car combination and goals.
DODGE 5.6L/340 Mopar small block LA Camshaft Kits Camshafts & Valvetrain Engines & Components - Mechanical flat tappet Cam Style - In Stock Filter Options - Vendor In Stock Filter Options - Camshafts Part Type - Free Shipping on Orders Over $99 at Summit Racing