Hello! I'm new here and a big sorry first for my bad English!

I've some question about my 429engine in my 72 ford t-bird. What are the possibilities to get more horsepower without a blower? And does anyone know where can i find some performance-headers?

Now there are some D2VE-AA cylinderheads mounted. The pre-owner have also mounted a EdelbrockPerformer460 intake manifold.

I read something about some heads from older series, but I am now a little confused and where can I buy it? If i change them, I think I have also to change other engine parts, perhaps the timing gear kit? And is it better to mount a new, stronger oilpump?
I come from Switzerland and its not easy to find some parts.

I don't know what's in your country the minimum octane number. We have here min. 95 octane, if it uses you.

I hope i can start to do something over the winter soon.

Thank you a lot for helping!!