I'm looking at putting the older MB duals on my old style frame GT. I know they will bolt to the block just fine, but I have concerns about them bolting the belt housing to prevent vibration. have you guys done it? is it worth the time fabricating parts?

I'm figuring used duals $150 vs. used BPS Q for $300. I'm going to be running a 4400 rev limit so I don't need the high flow pipes.