Engine Weight

Anyone know the weight difference between a 350/alph and a 454/bravo?

I'm trying to figure out the weight of my boat. It originaly had twin 350/alphas but has been repowered with 454mag/bravos. The original dry weight is listed at 5150 and I'm wondering what the new dry is.

Thanks Troutley. My limited math skills make that somewhere in the neighborhood of a 225 lb difference. I was thinking it would be more in the 400 lb range.