hi i have a early 454 340 blue water motor in my 21 chriscraft fishing boat. i have a late mod mpi injection unit i would like to install on it can i use 2 intake gaskets to make up the differance between the manifold and the head thanks joe

Sounds like a guaranteed water leak to me.

Rene

I wouldn't recommend it!

Mr. gasket makes intake gaskets that are 1/8 thick standard intakes gaskets are aprox 1/16,that could possibly help,but you need to check for proper distributor clearance also