I used that cam in a very mildly rebuilt 360 some years ago. .030 over, stock trw forged replacement pistons, nothing special. Actual compression might have been 9:1, and that might have been optimistic.
In the 360, it only pulled about 9 inches of vacuum, until I added a set of Rhoads bleed down lifters to it, which got me up to about 14-15 inches.
After that, there were no problems with the power brakes, or with the 2400 rpm stock type torque converter.
I think if you put that in the smaller 318, you stand a good chance of having even less power than you do now. I don't think the stock 318 valve springs are really going to be up the demands this cam will put on it, but who knows?
The proper springs for it still only cost $50-75, and aren't that hard to add.
You would also be wise to ditch the stock, plastic coated timing chain for a 340 type double roller, or at least an all steel single tooth. The plastic teeth will probably break off once you start beating on it (assuming it's the original timing chain and gears) and wind up in the oil pickup, or worse, the pump itself.
You don't want to know how I found out...!
With a stock type 1800-2200 (typical) OEM 318 torque converter, it's probably not going to want to idle well in gear, or have much in the way of low rpm performance.
If you had the 3000 stall and/or the gears in it, then it would do just fine.
Hope this helps,
Alan627b
