bent valve

You're gonna have to take the lower intake off in order to get things to seal properly when you put it back together. The intake is designed to be pulled/torqued down evenly on both sides. So you won't be able to do what you suggest - I think there's even a chance you could break the intake doing it that way. Chances are slim in my opinion that you'd get it to seal. In any event, you'd never get a gasket in there - think about assembly.

The real question is how did the valve get bent? I can't remember the details of when you were putting it together, or if you've had it apart. Valves usually get bent because they've hit a piston. Do you have potential p to v clearance issues?

No sense in just replacing the valve until you find out why it got bent - and solve that problem too. Otherwise, you'll likely bend the new one.

Bent valves can cause all sorts of geometry issues. Can also damage the valve guide - are you gonna have the head - rest of the valves looked at? Like I said, whether you did it, or the previous guy did it, if there's one, there could be more.

Decided to go with the thicker gasket even though we told you not to, huh? Good luck with it - by the way, the accepted minimums are .080" intake; .100" exhaust - so at .070" you're still pushing your luck.