318 2bbl manifold swap with OE cam - worth it?

We just put an Edelbrock 1406 600cfm, vac 2nd. on our stock 318 and totally popped our driver side engine mount, it was only 6 months old! You should see the tit in the center of the hood now! It was a big difference on cold and warm start up, better throttle responce, better low end to midrange, same on top end. However now we can adjust how we want. Also wanted to point out Edelbrock recommends a 500 cfm for 350 ci or under stock to light mods. We chose the 600 due to easy access for our area. I think we may be a little over carbed. The DVD that comes with the new carb is a really great teaching tool. I learned alot from it and alot more interesting that reading a book with diagrams!