I’m with Kim. The motor is out. And you know how it goes. Woulda, shoulda, coulda.
I’m no cam expert, but that one above from Howard seems too small. And I like Howard’s stuff. ... maybe with the “vacuum” requirement they were being a bit conservative.
What about getting a little aggressive with the cam and putting in a vacuum pump? Did it on wife’s car and it’s still extremely streetable ... but has that awesome “cammed” idle and performance.