I'm looking to do my own porting on the new 'Blazer, but I need a good place to start....pics would be marvy. I've done some porting before, so I'm not scared of weilding an air grinder around the motor....Thanks!!

Also, what would be a good amount to shave off the cylinder head to bump the compression up a little, but still be able to rund premium pump fuel? Thanks again....

Well The best thing you could do with your head is send it to rick ritter at RcR I think bubba297 does heads too.
both are a good choice the reason I say this is it's more then just cutting some off for best performance the combustion chamber area needs to be squared up in a lathe.
If you want to just cut some off go .025 and you can get away with premium fuel.
Be carfull with the porting the 250 is a piston port engine (no reeds) so theres no room for error you could loose bottom end performance real easy.

Jeff

Yeah, that's why I was hoping for some pics of the porting after its all done.....I don't wanna mess it up!!

Send it off to bubba or rick. Theve done this for a long time. When I'm ready for what your doing that's what I'll do.

Well I've been contemplating the reed valve mod, but if not then probably one of them will have another port job to do.....Messing it up and needing a new jug probably wouldn't impress the old lady too much......