Another 302 Head Question

I did my 1st DIY port job on a set of 273 heads in my cuda. 1st time doing it. I dont regret it, I took my time and followed the same thread(1 wild n crazy).
If you are "uncertain" do a DIY on the heads that are coming off(or junkers) and install the 302's with no portwork? Do the 302's later.
Good luck and welcome aboard