I have a very nice ported set of 906 heads in my house garage that ran 9.80’s many years ago but started leaking again water. I ran some block sealer and they never leaked again but I can’t bring myself to use them again. I also can’t bring myself to throw them on the scrap pile. Lol. After I’m dead and gone my kids can scrap them.

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time