Turbo slant six post

Well as for the CFM for the carb. I've calculated (and when I say "I"... I mean I plugged the numbers into an online calculator for CFM) that even at 100% VE at 4000 RPM the slant would need 260 CFM, so at 85% (being generous) it will need 221 CFM.
And trust me, It'll spin above 4k but has NO power up that high.
I'm more worried about the turbo, but for a first attempt and for what I paid, it will work for now.

The two pieces that I'm thinking about now are the oil return line and the oil pump.
To get the return line run into the side of the oil pan I'm going to have to drop the oil pan and weld a fitting to it, but to get the pan out to weld on it I've got to lift the engine....ugh.
The other option is to drill and tap the block just above the oil pan somewhere around the #4 or 5 cyl, but I'd still have to pull the pan so as not to get metal shavings down into the sump.
That's what is really holding me up on this....Once I cross that bridge it'll be "easy" or so I keep telling myself. :(