318 4 barrel boat intake/ single plane/ # 2846346

I've seen a few different industrial intakes. Some use a water crossover, but, yours looks to be the correct exhaust version. A car thermostat and cover should bolt right on, but, I would pull the old one off and check for bad corrosion. I'd also pull that plug in the front of the manifold, and install the correct nipple for the bypass hose before I get too much invested in cleaning that thing up. You may need to get an adaptor for the temp sender too, or find another location with the correct hole size and threads.