What is the best head gasket for Aluminum heads with steel block?

[racinjason29]

Whats the best head gasket to use? Brand and part # please I am running a steel block with aluminum heads, 3.47 crank, 6"rods, 2 valve relief flattops

[LateModel B23]

What bore?

[racinjason29]

4.030 is the bore size

[LateModel B23]

Fel-Pro 1003 is what I would use.

[usafracer]

I would use a mls gasket such as the 1142.

[perfconn]

FP1043 will give you more compression with that bore

[racer69]

The MLS gaskets work great AS LONG AS THE BLOCK IS SMOOTH! LOL That block I got burnt on last year wouldn't seal with them. Used the SuperSeal from Mr.Gasket. Stuck like glue! Too bad for the hidden crack beside the cam!

Oh and I found your door!

[ajanessaarley5642]

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[Jeffery]

MLS is what I bought, had a Fel Pro 1003 like above on it and it worked ok.