Not being able to leave well enough alone, I am modding the intake manifold on my '92 Dak 3.9. I've seen a few others fill the manifold, but with what?? I already have the runners cut and port matched and the bosses opened up, but have drawn a blank on filling it! I've found metal filler and JB Weld, but only the small tubes - nowhere near what I need. I'd like to get her running this weekend, but I need help...