Best way to proceed with improving up 427 Windsor street setup

[Ace23]

Hope everyone had a nice Thanksgiving. Pman and I took out the car for a 75 mile cruise last Wednesday night as this was my first time in the drivers seat since getting the car back on the road. The car ran great and the most interesting thing of the night was that the car appeared to be getting about 15-16mpg and previously it was getting about 9-10. I am going to test it again but that was really a big improvement. I made some pretty good pulls in the car and was shifting around 6900rpm.....the high rpm's are really growing on me and I think I can learn to enjoy the car for awhile the way it is. I will just have to teach myself how to drive something that requires higher RPMs. I came from a car that was making 530rwtq at 2500rpm so it is ust a completely different feel. I'm going to put a bit more seat time in it but I'm kicking the idea around of trying out a new gear ratio. With the .84 5th gear I have I think 3.73 may be a good start for me. I have printed out a few different rear ratio options and I'm going to review. I really don't want to get into any major changes right now I just want to have fun with the car. I figure the 3.73 gear would be inexpensive and something relatively simple and quick to change. If it turns out I don't like it I can go back to the 3.31's. We are also still tossing around the header change and what is involved......I don't think I have ever been so on the fence about what the results would be on a part swap. I've watched about every header test on youtube and searched every 1-3/4 vs 2" header test on forum that I can find. My heads are Brodix Track 1's and that may pose a challenge in requiring custom headers