Alright, my original exhaust manifold cracked while rebuilding the motor.I bought headers from Chevs of the 40s, steel not fentons.I installed them and I need to get heat to the rochester.The heat kit for the 235 will not work and no one makes a heat kit for the original intake manifold for the 216 any more.Besides fabbing my own heat kit I heard of people using coolant, how exactly did you guys set that up.I searched, theres only talk of doing it no step by steps.
Running coolant under the carb does not provide warm-up ***istance unless you also have a block/coolant heater that will circulate the coolant. Coolant under the carb is more for moderating the carb temp to keep fuel from boiling. .
Hey, I've got a 54 3100 w/ the 235. I think 73RR is right.... the goal of the heat riser is to warm up the manifold FAST, and I don't think the coolant will warm it up quickly enough to get the desired effect. I think your best bet is to either run a 1/2" or so metal tube from one of your header to the bottom of the manifold, or find a new, stock manifold that isn't cracked. I'm of the opinion that a fairly stock 235 or 216 needs manifold heat. if you don't want to cut on your new headers, but you want a customized exhaust you could alway try splitting a factory exhaust manifold. my $0.02
All you'd have to do to use a heat plate intended for a 235 on your 216 is slot two of the four bolt holes; I believe the outside holes line up, but the two nearest the cylinder head do not.
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