If you were not going to do a proper repair you could have just used something like this that won't rust at least! https://www.npdlink.com/store/?p=catalog&mode=newsearch&search_str=cowl+repair+&parent=1&year=0
That's a street engine with those huge ports? I have a feeling you are going to be very disappointed in its low end torque. That engine will just be coming to life about 4500. You need to go with small port heads with short tube headers. IMO
I don't know of one in south Florida. There is a guy west of Starke fl. on sr 100 that has a bunch of Mopars. I think his name is Jerry. I haven't talked to him in awhile but is at Mopars at Garlits in November. I will look for his number.