Yeah seafoam is good but from what i've read redline is better. I'll start it up from redline and then maybe add seafoam in the second tank of gas, wont hurt as long as there is something in tank to dissolve and stop varnish/rust
I highly doubt that. Seafoam is the standard for varnish removal.
In fact, it's so strong that it'll eat a hole in an EVAP vacuum hose that's on the edge. I ran a can in the tank of my Ford for maintenance, and afterwards I had a check engine light for the EVAP system that was fixed by replacing the hoses. I'm more cautious about using it now and I don't think I'll dump it in the tank any more, lol!
Thank you all. This plan was a success. I was able to circulate the gas and catch a lot of gunk in the return wix filter I added (mainly from the fuel rail and return line). For anyone trying to start the car with old gas I definitely recommend a temp filter on the return line, it'll keep your fuel system clean !