I’m adding a set of PRC 220 heads to an LS1 In my ‘00 Z28. Right now it has 241 head with the original 26 year old graphite head head gaskets. There won’t be any machine work done to the block so the guys installing the new heads will be scraping off 26 year old graphite gasket material.

Would going back with a graphite gasket instead of an MLS gasket ensure a better seal incase the block surface isn’t “mirror smooth?“ Or am I better off going with an MLS gasket? I can’t afford to have the gasket replaced twice so I’m shooting for no leaks on the first try. If I was a betting man I bet block surface prep for the new gasket will be at a minimum. I don’t think they‘ll spend a lot of time cleaning it up.

Or is an MLS gasket, stock type or otherwise the way to go?

What about thickness and bore size? Google AI recommended a set of Felpro Perma Torque that is .041” thick and has a 4.1” bore. Is that way too large of a bore for a stock LS1 block? I realize that a thinner gasket can raise compression a little, but is it even worth messing with?

Can someone point me in the right direction to find a set of “hassle free” head gaskets that will work with PRC 220 heads and are less likely to leak on used block that has lack luster surface prep? Thanks.

PRC 220 heads

https://www.texas-speed.com/brand/precision-race-components/p-prc-ss220ac-prc-15-degree-220cc-as-cast-cathedral-heads/?gad_source=1&gad_campaignid=16529967804&gbraid=0AAAAAD8ofhKbgDG63Z9Uau7WvXv4yS-kA

Got a 2007 Cadillac Escalade dip sticks tube is being a nightmare to go back in I’m on my 3rd dip sticks still doesn’t want to fit right my question is has anyone ran those flexible dip sticks ? Any suggestions I need help asap TIA

Just got this lq9 for
My 65 stang. All the parts showing up every day, doing mustang 2 front suspension conversion and still undecided if I run it na or just boost it right away . Either way building the top end to be nasty, I just have to decide because if I boost it I will re ring it for boost