I haven't read much after 1st post.
question - did you use tstat housing base gasket with rivets that grounds it to the intake ? If not, your coolant temp sensor may not read anything

https://cimg4.ibsrv.net/gimg/www.off...ab80a6a47.jpeg

Yes, I ran the numbers in the parts diagram and put all the correct gaskets in place...I checked the guage by grounding the wire to the sender case and to a bolt on the intake,

Right now I have the corrct base gasket, the correct tstat, the correct upper gasket (with no hole) and the correct sleeve in the housing, as per to 330 diagram, and have the cooling issue...I'm contemplating switching the housing to the 502 style 2 hose, and seeing if that works...

https://cimg5.ibsrv.net/gimg/www.off...92f234db05.gif

Yes that's what I have...so the elbows get water from the balled T fitting right away....but the manifolds only get water after the t stat opens, he gasket and sleeve block off and flow until then...Im guessing but maybe the coolant is going through the intake, and out the t fitting to the elbows so it never gets held up to absorb heat...there is always flow...in the 454Magnum/502 set up, the water is held in the intake by the tstat, so it has to warm up before it opens and flows...
does that make sense, or am i missing something about the 4 hose setup i have?

You are slightly incorrect about the 4 port magnum set up - unless i am misunderstanding your ‘held up’ term. Look for posts from me on these. I dissected them well.

this sounds like a good read on a saturday morning with a cup of coffee: ) imma make a cup and look it up:)

found your post, yes I agree completely, I think this is what i should be running. When I say held up, I mean the only flow out of the intake, is through the tstat and the small bypass hose that goes back to the waterpump...I'm trying to find the diagram I had of the 330 flow...

So this is what I have now, the manifolds only get cooling water after the tstat opens, would this not allow the heads to overheat when there is no flow? the tstat doesnt hold any flow as the engine warms up, allowing coolig water to blast by...maybe this is my running cold problem?
https://clubsearay.com/index.php?att...01-jpg.115719/

Is one more desirable than the other? I don't know what I can change on my setup to get the temps up....also as mentioned, original 330 had signs of overheated heads, I would think my setup is prone to that, because of the no flow to exhaust manifolds...

does the thermostat have a bypass hole in it?if not,add a couple of 3/16" holes