Keeping the car...Dart or SVO block???

I had played with the idea of selling/parting my 95.

Since prices are so low right now I am going to keep it.

But....building a new short block. I want to spin the motor/blower higher and throw more boost to it.

Who has experience with the Dart or SVO R blocks? Pros & Cons to each?

I want to keep most of my current hardware...heads cam etc..

Im making 660 now and I believe I am exceeding the power I would consider reliable for this block. Considering that a blower is realatively inefficent and eats somewhere between 15-25% of engine power to make desired crank output. so figure...if I am making 660whp...losing 15% drivetrain..and 15-20% with the blower That means the motor itself is making around 850-900hp in theory. I think this is why Ford dropped the HP rating on the B50 Block. 450whp is not 450hp.

I think with a YSi or possibly turbo I can go 800+ at the wheels