For Doc and others that are familiar with "project scottsdale" i have made some more upgrades to the motor worth mentioning.
- Recurved the distributor using 10 degree vacuum advance canister available from ac delco and moroso curve kit using light springs.
- 1" tapered spacer designed specifically for engines using the Edelbrock performer rpm air-gap manifold and square-bore carb, high velocity heads part # ST4150-4, 0.oo
- Removed engine driven cooling fan and installed a proform 16" electric cooling fan with thermal snap switch.
The engine responded way better than expected with a lot more power and a smoother more linear power delivery. The Dart Iron Eagle heads with their 180cc intake runners will support
500hp and are begging for more cam duration @.050" valve lift. I am sold on the benefits of roller tappet cams and the new beehive valve springs that Comp makes so the next step is a comp Xtreme roller grind,probably the "XR282HR" which is a dual-pattern hydraulic with 230/236 duration @.050", 288/294 advertised duration, .510/.520" lift @ valve, 110 degree lobe seperation angle and a 2200-5800 rpm powerband. A Hughes 2000 rpm stall converter will replace the stock unit, and a Proform 750 double-pumper will replace the Edelbrock 600 that currently lives a-top "Danger Mouse". I'm confident the future mods will help the engine exceed my original goal of 450hp and yet be comfortably streetable.-- Mad Dog
79 K10 4x4 "slightly modified"