On the windsor engine I am about to build it will have an external
oil pump, mounted below the
oil level of a properly baffled 7 -8QT sump, should be able to do it for about $USD500.
Having owned some nice little 270 - 300bhp 289's I have never had a problem with the pencil
oil pump drive, but in a much more powerful stroker type engine, that will see a few hard miles - its should be good insurance.
By the way for what its worth I have had the best results for stable oil pressure, under adverse conditions when I had my oil cooler covered for a race somtime ago in my old LS7 Cobra, using Castrol (synthtetic) RS 10w60, the engine never dropped below 60psi , while exceeding 260 degrees. Previous to that when I first ran the car it came with a well known brand of mono grade 50w oil, that was to thick when cold and guess what to thin when hot!, then a syn racing oil from the same company, those oils might lubricate well but had poor performance when hot in the big GM, so my message as well is Accusumps might be good - but good oil is worth it weight in gold - Ant.