- Oct 8, 2003
- Houston Texas
- 1968 Convertible - Candy Apple - 427/475+
From what I've been told, a 427 big block has a tendency to hold an extra amount of hot coolant on the back side of the intake manifold. I've also heard that you can plum out the intake to keep that hot coolant from collecting on the back side. Has anyone ever heard this too or has done it? I would like to know what was needed, how it was done, photos if possible.