I use them on my 63-1/2 with a 514 and C6. You can't really beat them for the money. Even if you have to mod them at a local muffler shop they are worth it to get long tubes instead of shortys. I have pics posted of the test fit at: Yahoo! Photos - 1963-1/2 Ford Galaxie
I tried to use the brush on header coating from Eastwood - don't waste your time. I hope to have mine HPC coated at some point instead.