Streetable 12 second 20+ mpg slant six?

more or less dreamland I had a 12 sec leaning tower of power in early 90's I was running 12.teens @ 106ish mph. my personal best was 11.98! Fast for 1993! I took a LOT of money and hurt a lot of feelings with it, but was not really a driver. I stripped everything i mean everything! fiberglass fenders, bumpers, hood, no hinges lexan side windows 2 plastic racing seats & no dash I stripped everything. I got it down to 2272 with me in it i ran 9" drums manual steering manual brakes 3.91 gears 8.5 in slicks tf 904 something crazy like 4k stall trans brake all that with 225 slant although I was cheating with early aluminum block again save weight. try y headers duals 4bbl running" race fuel" Credit due to my shop teacher who helped me build motor in school. all that for 12's it can be done practical, probably not