alum edelbrock heads

The first pair I bought was in 2000.
Used them out of the box, no concerns.

Built a better engine for them, went from a mild hydraulic cam to a solid lifter hi-lift cam.
Had to open up the push rod tunnels for clearance at max lift.

I also had them checked during the second engine build, no concerns with them.
All I did was to change the valve springs to go with the cam.

Used Fel Pro gaskets back then.