Prothane Motor Mount / Roush 427R Woes

[Tim Terry]

We completed mating of the Quaife gearbox to the Roush last evening. Proceeded to the motor mounts, but didn't get far.

I have the Prothane 6-503-BL mounts recommended for this install. However, the mounts can't be tightened to the block on the Roush 427SR. There is webbing on the Roush block that prevents this (see photo). I don't believe the webbing can be clearanced enough, so I think it's time for a different motor mount - one with a narrower flange.

Thoughts? Recommendations for this install?

Thanks!

 

[Rick Muck- Mark IV]

Call Olthoff and get his set. They use Prothane Chevy insulators on custom brackets that will clear the webbing.

 

[Randy V]

Don't alter the webbing on the block, just use a 3.5" cutoff wheel on a high speed air tool to cut a relief into the mount.

 

[Mike]

Call Olthoff and get his set. They use Prothane Chevy insulators on custom brackets that will clear the webbing.

Ditto. Mine fit both my 427 Dart block and my new 302 alloy Dart block perfectly.

 

[Tim Terry]

Will do! I was worried about affecting the structural integrity of the motor mount.

Thanks, Gentlemen.

 

[Tim Terry]

Update: One call to Olthoff and the problem is solved. As mentioned above, their motor mount kit uses a BB Chev insert, available from AutoZone. Along with the brackets supplied on the chassis and in the parts box, we should have the drivetrain installed very soon. Thanks again.