After Niles 100 hp reference, I ordered the Proform, but thanks for the idea Sllib. If this doesn't work, I'll send it back and try that.
Right now the catch is the 4150-9379 has an older style mechanical linkage where the cam actually rides on a shaft that is cast into the side of the main body. Looks like I will have to change to the newer style secondary linkage that doesn't connect to the main body. I think I'll probably just throw down on the Proform billet base plate while I'm at it. That would put in for about $250, and keeping the old bowls and metering blocks.
Also dropping the jet sizes from 68 to 67 on the primaries and 81 to 80 on the secondary side. The last dyno run I had the guy doing the run suggested I needed to lean it out some. Will dial it in on the dyno next run. Also changed the accelerator pump shooters to a larger size per his other suggestion, and will refine this on the dyno as well.
I've kind of broken the cardinal rule as I've now changed multiple stuff (the carb, changed the advance, and put in new parts on the distributor) and now will go back to the dyno with no idea which of these things contributed what to any changes. Well at least all are relatively easy to mess with during the runs to see what impact they have. Will let you know when I get that far.
Thanks!
Scott
