Breathing deep (porting my heads)

[bmxmon]

I have a couple questions about porting my heads, which if all goes well I will be starting tomorrow. I decided it would be alot better idea to take my valves out to port my heads easier, and not screw up the valve on accident. Taking them out, the exhaust valves come apart really easy, but i cant get the intake valves to budge. I can get the spring compressed, but for some reason the little cap and clip things wont come off. Is there a trick to this?? Also, I was looking over the inside of the exhaust port, and that big hump that everybody told me to get rid of, and it kinda has a transistion to the valve hole. Is it ok to grind this down also?? I would think it would, but want to be sure. One more thing, a bit off topic. Does anybody know if the motor mounts for a 65 stang 289 will accept a 79 302?? Or any mounts that will. Thanks for the help all. I will hopefully be getting the machining work(to the block) started on Friday (pay day). I am getting pretty excited, i think it will be a real screamer. Thanks all!