Which one will work without burning out the motor too quickly. I want to port my heads and intake this winter.. There are some on Ebay for little money but does anybody know if they are good enough. Thanks..

I have a good setup. I'll take a picture tonight.
I got the grinder at Sears.

Lets see some pics and how much did you pay for it and what is the model number????

It's the only non-angled grinder they sell at Sears besides the little dremel tools. It cost right around $100.

The most important part about keeping it alive is that variable speed controller that you see to the left. I got that at Harbor Freight for around $12. I run my carbides at a very slow speed. If you run them at high speed they will bend and become very unbalanced and that's what smokes the bearings.
The carbide in the pic is my most aggressive cutter. I have others with a more shallow cut. I use the sanding cartridges you see in the pic to the left of the carbide to do the finishing.

if you have to use eletric sears would be a good choice since it'll come with a 90 day return if you do burn it up.

wow, that thing looks big and heavy

http://www.coopertools.com/brands/dotco/index.cfm