Reply to "Question for the Bosswrench"

In a 351C in a Pantera, oil routinely heats up quickly to 200-220. Hot oil will drop pressure: cold pressure should be around 70-80 psi at 1000rpms, dropping to 50-60 psi at 190-220 degrees, if the engine is tight. Worn bearings including cam bearings will cause the hot pressure to drop much further and its unhealthy to operate a 351C at high rpms with less than 50psi. Loose oil galley plugs might cause the hot pressure to drop, but they're screw-in allens so thats not likely. If the water temp exceeds 220 at very high speeds in 5th gear, oil temps will routinely go s high as 275 unless you run a full-flow oil cooler. I recommend a 10-qt oil pan, 30-wt oil & a stock (not high-pressure nor hi-volume) oil pump, for all Panteras. Incidently, the stock pressure & temp gauges are highly inaccurate: use mechanical gauges for accuracy & stockers to verify the engine is running.... IMHO, the only oil cooler worth using on a high speed Pantera is a water-to-oil type, unless you don't mind hacking a huge hole in the front end for a decent sized air-to-oil cooler such as Porsches use. I doubt if the lifter bores are undersized, since the likely result would be lifter seizure, not oil heating. Non-roller lifters are designed to spin at maybe 40-50 rpm while the engine is running so you'll normally get a circular wear pattern on the bases from any solid or hydraulic lifters.