318 intake manifold problems

That's what I told the mechanic, the bolt pattern would be different. Didn't a magnum intake sit up high also
Magnum engines;

The stock “Beer Keg” intake is a bit high. If your running a carb, a cheap intake that will work well for low to mid rpm is the chink rip off rpm. The Edelbrock is much better but expensive.

Get what you pay for.