Woodreaux I make stock from blanks all the time without semi inletting. Step one is lay out the blank so that you can achieve all the required dimensions.
Next, saw cut the end of the blank to match the angle of the back of the reciever and also saw the shape of the tang. Clamp the blank in a vise and lay the reciever on the
on the cut tyiu made for the tange and trace it out with a scribe. Then it is only a matter of chiseling everything out until the receiver prints on the blank like you would want it to.
You will need a good stock clamp to get the receiver to pull back into your tang cuts and position itself the same way every time.
Once the receiver is inlet then clamp the receiver in place and lay the floor plate on the black and repeat the process. I know this is all very general but that is basically how it goes