What is the best head gasket

[74 challenge]

I have never had a fel-pro go on me, but every engine I take the heads off I swap to MLS. I just think it's a better product I know in theory I don't need it.

My dad on the other hand is stuck in 1970 and wouldn't touch MLS. Something about "it worked for 30 years"

[Oldschool]

I use these on my Indy headed 528. No problems with them - ever.

http://stores.casselent.com/Detail.bok?no=113

 

[moper]

The best head gasket is the right one for your performance expectations. While some factory engines make use of MLS there is little need for them on the older engines unless you need a certain thickness, and you have it machined for them. They require a smoother finish than any fiber/combination gasket. If you are not having the engine amchined, or your shop does nmot have a profilometer to test the Ra value than I'd just run a composite gasket. If the engine has MLS gaskets now then you might try running it and see if the leak seals itself.

[Chryco Psycho]

The best head gasket is the right one for your performance expectations. While some factory engines make use of MLS there is little need for them on the older engines unless you need a certain thickness, and you have it machined for them. They require a smoother finish than any fiber/combination gasket. If you are not having the engine amchined, or your shop does nmot have a profilometer to test the Ra value than I'd just run a composite gasket. If the engine has MLS gaskets now then you might try running it and see if the leak seals itself.

I have to disagree alum simply expands @ 2x the rate of steel so everytime the engine fully heats & cools the fibers in the gasket are flexing & eventually tearing , I have yet to see a Fiber gasket last between an iron block & alum heads , yes they will last for a season , maybe 2 in a warmer climate or temp controlled garage but not with real world heat & cold .