Slant heat riser block off/delete?

I made a block off plate for mine out of some fender sheet metal. Blasted it, primed and painted it with 2000 degree VHT paint and assembled it with the gaskets from Remflex. I also sprayed it liberally with Copper Coat. Has no problem cold starting. Idles in about 20 seconds and runs fine. With headers, there's zero contact there anyway, so the argument that is somehow has a negative effect is a moot one. Even the Dutra duals have no provision for it using both pieces. Lastly, if Chrysler thought it aided performance in the least to have manifold heating, then why didn't they include it on the Hyper Pack? They did not.