Heat crossover ????

I have on BB and SB. But it takes a lot of foil and you have to drive it in with a punch, or will erode away.
Finally, I did something more permanent.
I lined the port with foil and poured a melted piston in the crossover hole. Plucked out the foil and blended it into the bowl. Flowed better too ;)
Nobody laughed at me after that..