MRL Mild 440

MRL Performance said

Well, it idled very well at 900rpm pulling 16inches of vacuum. Kinda quite, nice sound. I ran it with a MSD 6, just like the one he has at home. I also ran it with the new FBO stock replacement ignition box. More on that in a minute.

It ran very well, and after a jet change, we got it into the mid to high 12's on A/F ratio and high 300's to low 400's on BSFC.

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I'm impressed with how much vacuum is pulls. That seems to mean it's power brake booster friendly. I'm used to small blocks and that cam seems aggressive. Does it pull so much vacuum because it's a Big Block?

Also, 12's for A/F is great for power but since your customer wanted more street ability would the engine run as well if the A/F ratio was closer to that magic 14.7 mark or more (which a vaccum advance distributor too of course)?

I ask because now I'm thinking of not rebuilding my 360 and going with a Big Block instead as a "to school and back or work and back" daily driver.