Blocking the heat crossover, IN the head.

Fel pro makes intake gaskets that have the cross over blocked off ive got them on my 273. It works just fine & keeps carb cooler cor sure. By all means DONT MAKE YOUR OWN BLOCK OFF PLATES!!!! I did & had the dr. side one get into the #5 cyl.!! I got soooooooo lucky it didn't do any damage other than dent the top of the piston a little. There is a thread on here I started about 1 1/2 ago on this very subject. I swore it was my mms head gasket failing but it was my home brew block off plate instead!