Depnds on what you want to do, but with an extended swinger of at least +6 and modified (lightened) front end like that, you are well on the way to a bad-ass sand drag bike or duner. Trail Blasters are a dime a dozen.
Oh, without any suspension travel, I guess it wouldn't work for the dunes, but sand drags I guess. To use that other frame you will need the stock front a-arms at least. Those springed shocks look like stock Blaster shocks.
Ah, so you do have the stock a-arms. Then if you want something that rides and turns, I would go with the stock setup.
BTW, here is a pic of my motor I just finished. You can see the clutch arm isn't quite 90 deg, but that is because there is zero tension on it. As installed, with the cable, it is an almost perfect 90.
Nice! Yeah i can see the difference. And the intake book is way different than mine. I would use the stock arms on the light frame but i dont have the top crossbar