the tears originate in the tune. Sure the Multi-strike can get rid of it but so can setting the carb up right. And a heckuva lot cheaper. As little as 3 minutes with an improperly set carb on a medium sized cam to at most, an hour with a 292/108/
I applaud your zeal to work the 318.
As for me I wouldn't waste a nickle on it in that car, unless I would supercharge it, and even then I'd be shaking my head.
That chassis needs TORQUE, not horsepower. Hp is easy to get just rev it up.
There are only two ways to add torque; more cubes, or more cylinder pressure.
Sticking with a 318 precludes more cubes; leaving pressure.
And NA pressure with a 318 doesn't lead to enough torque by itself, to be particularly satisfying.
That just leaves jamming more air into it with supercharging. And I'm no fan of those side-winders. Leaving turbo's.
With turbo's you can leave behind; the hi-stall, the race-gears, the need for overdrive,the race-cam,the big fancy hi-flow heads, the $600 headers, the expensive intake, all that stuff. Poof!
And the best part is there's gotta be thousands and thousands of smogger-teens sitting in the corners of America's garages just waiting for you to call. Wait I see about 6 of em every time I walk into my shed.
But you just know I also have several 360s....... so guess which one I'd choose for that 4000 pound tank..... or even my 3650# Barracuda; I ain't getting any lighter,yaknow,lol; and neither is the car.
Whatever you decide,
Happy Wrenching.