looking for info on best grinder in oval out my manifold

[copasspupil]

I'm switching manifolds and going TBI for the 350. I have to oval out the inner 4 holes and my die grinder sucks #$#$#@. Looking for info one a good tool to buy and use for this job. I don't mind buying quality, my earlier mistakes with buying from HF is rearing it's ugly head again.

 

[weez440]

we have air powered die grinders at work and they are great, it takes alot to power them out and you put a diamond tip on and they cut like crazy. maybe all you need is a good die grinder. and i noticed you mentioned hf and my motto is buy quality tools the first time and be done.

 

[copasspupil]

I stopped the MAC truck guy on Friday and picked up something that should work. I hope to find out Monday.