An adjustable fuel pressure regulator will set you back 100-150 if I'm correct. They are simple to adjust, you'll need a fuel pressure gauge, I think most adjust with a screw.
88workcar was running the B cam on the speed density system for a while. He had his car running low/mid 12's with that cam.
The cars lifespan shouldn't be heavily affected by running that combination. A stock cam with 1.7:1 roller rockers is also an option if you want to make sure your speed density car remains easy to keep in tune and running well.
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