Well after testing yesterday morning I was able to try a few things that may be of some interest to some. The air quality was very good yesterday with the correction factor hovering at about 1.00 which is rare. Usually the STP correction factor is anywhere from 1.025-1.05
Anyways I started with the four hole Wilson and power was 427-428 @ 5900-6000rpm with torque in the 435-437 ft/lb range with excellent consistency from pull to pull. Jetting wound up @ 80-85 with the customers 750 Proform. Timing was 35 total and not changed. Just to satisfy my curiosity I removed the electric water pump and installed the customer's water pump with a single v belt. Torque was unaffected but power was now down about 7-8 hp at the very top of the RPM range. The last 2 tests were to verify power output minus the spacer and electric water pump. Torque was solidly up into the 440 lb/ft range with horsepower unaffected and still hanging @ 420-421. The no spacer pull's averages were actually 1 hp and 1.5 ft/lbs better over the entire 3500 rpm-6000 rpm span. I do not have a scanner at the shop so maybe I can scan and post the sheets tonight. I will have another stock stroke 360 with ported EQ Magnums on the dyno soon-it will be very interesting to see how it compares. J.Rob