Mitch,
Welcome to the Forums.
If the engine is newly rebuilt, clearances are proably tight and a little extra heat is normal. Verify the actual temp with a calibrated or IR guage, and 180 degrees + or minus 10 degrees is good.
Most folks on the board favor Q-jets for the best economy/performance balance. I recommend that you go to Cliff Ruggles, a regular poster here for a properly setup Q-Jet for that 400.
Les
66 GTO Sport Coupe,455/trips,700r/2500stall,12bolt/3.08,1.79/13.01/104.5
68 GP daily driver and 2004 Route 66 Tour participant under restoration
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Better lucky than good
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Les Iden
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'65 Buick Sport Wagon Custom, 340, T350, 3:23
'66 GTO Post/468, 700R4, 3.31 (Mike's as of 9-16)
'68 Grand Prix/455, dual AFBs, T400, 2:93 posi (sold)
'72 TA tribute/461, T400, 3.08, (Russ's as of 9-16)
'97 Mitsubishi Eclipse Spyder Turbo, Konis, 5 speed
'09 Torrent GXP, nav, Sun & Sound pkg., Bilsteins
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