Rebuilt Engine vs. Custom Engine

[BlooDReigN]

I'm looking at buying a mustang and putting a 400CI+ engine in it. I'm trying to get an idea of what it will cost to do all the things I want, but am kinda stumped here.

Are there any major differences between buying a rebuilt engine vs a custom engine? Is the rebuilt engine alot less reliable? I'm assuming this is the case or else there wouldn't be a 300- 400% price difference between the two.

Any help I can get on this matter would be much appreciated.

[MustangRoadRacer]

wait for the ford racing 5L "cammer crate engine".
It will be very powerfull and reasonably priced.
should eb out soon.
do a google for more info.

[BlooDReigN]

Thanks, I will look in to it.

Would still like to know the major differences between the two.

[KC Ron Carter]

Is a matter of usage more than source.

Many performance tuners like an iron block to have been thermal cycled to provide a more seasoned surface.

Many manufactures will also store the engine castings and allow them to rust before machining to get the same molecular alignment as a used block.

The builder and the tolerances he uses, and the parts he installs are the real deal.

You can get a dang good engine from both, but if used beyound the design it is junk looking for a place to happen.

Here is a dang good Stang Dyno run.