turbocvette

Don't really want to spend 15k-20k on this topic and the options I got so far are to buy built trans, build the rear end etc that would get to 15k fairly quickly for my power goals.
Or I was thinking of buying a built rear end $2500-$5000 and get a built glide with 4 link etc Just looking for input on this for cost vs performance and maintaining the mods say the built 4l60 lets go or something. What would be a winning combination for a budget of $5000 to $10000 used parts are ok. Looking for 750+ hp range