(Newbe) 273 to a 340 and tremec 5speed swap.

so, 6500 for a 340 5spd setup that maybe you could get for 55? i see a bell, and headers but unless that stuff comes with or is a-body specific there's another 1~2K plus all the other stuff you'll need: z-bar, shifter, pedals, trans hump, mount... so let's call that another 1K

so maybe you get it all together and in for about 9K on the high side and 7 on the low side.

you've got 14 in the car already, so now you're looking at 21~23 for a car that would probably sell for 18~20, unless you addressed the cosmetic issues on the interior. which, maybe you can spruce that up for 2~3 grand. so again, you're at 23~26 on a car that's worth about that.

maybe you clear 1~2K on the flip. brother, that's a lot of squeeze for some bitter juice.