Remember too, that the method of calculating power output on a dyno will give you unexpected results compared to what the factory ratings were. At least after '72 when they changed to "net" power from the earlier "gross" power ratings method.
For them to be consistent with crate motor dyno results you'd probably have to go back to the '71 and older ratings of 160 to 215 horsepower for the 302 (205 in the Bronco). This was the "gross" power number, while the '76 was rated at "net" power with all the power robbing accessories connected and it tuned to official emissions specifications. I don't think that included drivetrains though, so any chassis dyno is going to give you numbers even lower.
And though I don't know the dynamics of it all, it's very likely a Bronco with 35" tires is going to show a lower number than one fitted with 28" tires. Gearing aside, which could in fact make the numbers look better or worse.
The engine builders are giving you the engine's full potential, so gains over your 140bhp look impressive on paper (and they are!) but you're missing about 30bhp minimum at least, going up from there.
Is your desired result the most power for your dollar? Or less "waste' of natural resources and keeping the original motor with the Bronco? Or something in-between?
And what will you be setting up the Bronco as, and using it for?
Those all might be key factors in which way you go.
But even with their built-in advantage in some cases, you still have to add the peripheral EFI bits to the overall cost. Just like you have to with the stock motor.
Paul
