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Looks like you have a streetish cam, probably no need for you, from my exp. anyway.
My 12.5 383 with [Email]275@.050[/Email] needs lots just to run, but I still eneded up putting 6* back into the dist. locked out can be hard on pistons/pins/bearings, esp on street gas.



When you say that locking out is hard on bottom end parts, is that upon initial start up only? or at lower rpm's as well? Lower octane compounds these problems?

My cam is 240/248 at .050". Used to have the MP electric dizzy, swapped in a lean burn one locked out to 36 total. I have a Mallory hyfire 685 box, and I have all ten degrees of programmable start retard on currently, and the car starts fine. Two things that changed though was the car idles smoother (not sure the science of this) and it seems at lower rpms at part throttle acceleration that the car sometimes has a very slight surge.

My main reason for locking it out was for when i run the nitrous