I put an Offenhauser intake and the four bbl Holley 390 on my 1965 Valiant.

I also changed the cylinder head to one I pulled of a 1976 dart.

I don't have the carb or the valves adjusted that well yet but, it is running.

However, it is running a bit hot.

Do you think that this might be because I set the valves a bit "loose"? I set them at more than .022 exhaust and over .012 intake because the car was cold when I was doing this and I figured that the heat would cause it to tighten up?

Or do you think that running different spark plugs would help?

Thanks

A lean fuel mix will run hot. It's just my first guess, but check for vacuum leaks and mixture adjustment.

I won't say your other ideas are way off, but I don't really know.

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1980 Aspen 225 super six

do yourself a favor and readjust the valves hot. cold adjustments just aren't accurate.

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check ignition timing and your vacuum advance. the vacuum advance hose fell off my dist. one time and caused the engine to overheat(read: boiling) from retarded timing.

zedpapa

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1970 dodge dart w/225 /6 bored .040" over, holley 390cfm w/vac. sec., compcams 252s, clifford shorty headers w/2.5" exhaust w/flowmaster, f-body 11" front discs, aluminum A-833OD, 8 1/4 w/3.21 SG
soon to have 5 gears!!!

I would say warped cylinder head and/or bad head gasket.
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