318 to 440 dart.

Don't let certain people who have no knowledge of this swap discourage you.

Use Schumacher mounts and their torque strap. They work just fine. An upgrade would be to use a 73 and newer K-member. The ultimate option would be to use a reputable coil over setup like an AlterKation.

If you are starting from ground zero and not reusing any parts you already have there isn't a major difference going to a big block.

The weight difference is a joke. Functionally you are far ahead of the game at any power level. Let me further explain that. A 400hp 440 is very mild. A 400hp LA is not. It costs more to get 400hp out of an LA than to get 400hp out of a 440.

I've done two 440 builds. I'm not saying I wouldn't build a SB car but man these 440 darts are a tough combo to pass up.