318-3 Closed Chamber Truck Heads

It is 1,000 percent a water jacket. I'll get pics later to demonstrate.

I have a '68 318 for my dart replica (Aussie Valiant Hardtop) Running a 4spd and 3.23 LSD

Stock bottom end, performer intake, extractors and dual pipes.

Other than the closed chamber heads thinking an XE256 or 268 Cam, 600 vac sec holley.