440 power gains/ aluminum head advantages?

okay sounds good. now i've got my t bar slots welded in most the way and i used a drill bit the same size as the advance weight posts to make it fit. but i can file them bigger if i need more advance. i'll play with the timing some more tomorrow and see if i can't get it happier. thanks for enlightening me about the vac advance function. i always find something more to learn!
Here is the distributor slot sizes for the given advance degrees.
https://www.forabodiesonly.com/mopar/threads/distributor-advance.229240/#post-1969917374