Join Date: Jul 2016
Location: North Louisiana
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Don't think you'll need any of the thick cam break-in paste, if the cam & lifters were broke in years ago. I'd just pour some of the oil your gonna use on all the lobes.
Wouldn't hurt to prime the engine with oil, by turning the oil pump driveshaft counter clockwise, with a 1/2" drill. I made a priming tool out of a Pontiac HEI housing & a Chevy HEI shaft, if I remember correctly. Just primed my 455 bracket engine with it yesterday, before cranking it.
I think I read somewhere that it's a good idea to turn it about 30 seconds, then rotate the crank 90°, and turn it 30 more seconds, then 90° more, & so on, so that you turn it 30 seconds in 4 different crank positions, 90° apart. Don't know that this is absolutely necessary, but I suppose it won't hurt anything.
As for the oil, I've never used synthetic oil, nor oil that thin, in a Pontiac engine. Not saying there's anything wrong with either. But, if you'll be driving in cold weather, I suppose thinner oil would be a good thing. For my 455 drag engines, I used either 50w or 20W-50, plus a can of STP--the really thick stuff. Was careful to keep the rpm low, til everything got warmed up good. The thick oil gets thin after it's hot.
In the last few years I've switched to 15W-40 oil, which is suitable for diesel engines. Lots of guys use it. But, lots of guys badmouth it. Just like lots of guys have run aviation gas in their hot rod for years, and some say don't use it. Different strokes. Car guys will all never agree about which oil and filter is best.