Pulling out 7.4L 310MPI motors and putting in 502 Mag EFI or 500 HP. What do these motors weigh fully dressed? Will 1000 lb chain hoist do the job?

yeah it should. pull teh exhuast to be on eth safe side plus it make it easier to move around. That alone will knock off 100 lbs or more if you have stock cast manifolds. Ar eyou using achhain hoist or charry picker? I used my cherry pick on the 500lbs extension setting once and was fine. I need a few extra inces to get it out of my truck. I know trhe manufactureers figure in a 50% safety margin when rating that stuff. So you can go over (once in a while) and still be fine.

Ya I would pull the manifolds otherwise you will be on the edge of the things capacity. With the manifold off you should be fine. I use a 1.5 ton hoiste to be totally safe.

Jon

dressed weight is in the 1200 lb more or less range.

A one ton unit should work, as long as it's not a Chinease one! No offense, but I figure a 4x safety margin when buying the cheap import stuff.

Yea, I wouldnt try less than a 1 ton (2000lb). I had an electric hoist rated 1000 lbs and although it would pick the engine up, the brake wouldnt hold. I think fully dressed stock merc motor with all cast iron manifolds is easily 1200lbs if not more.

I was always under the assumption that a Mercruiser Big Block with a Bravo drive package weighed in around 1200 lbs.