sbc block

[mclendon]

noticed the block I have has lifter valley breather vents installed ,it had a solid cam , I'm changing to hydraulic , can I leave them in or do they need to come out? thanks.

[keeks]

I'm thinking you will be fine leaving those in there. You're gonna want to remove any restrictors that might be installed in the back of the block though.

[mclendon]

will do ...... thanks for the help.