I got a 250 six backed by top loader 3 speed and hurst shifter out of a 69 mustang in the shop waiting to be dropped into something. I just about dropped it into the 52, but shift linkage was going to be a pain/$. I have been eyeing a 60 to 63 falcon two door. It's a factory six with 3 on the tree. If I can save up enough I am going to snag it. I already have the radiator, engine/trans, drive shaft, v8 rearend, front disk brake spindles in the shop that fits.
If I did I was thinking about dropping a newer 200 six head on the 250, dura spark electronic ignition, cd box and then either putting a big 2v carb on it, or drilling out the log and welding on tabs so it can be tri carbed. I had the 200 six hot in my mustang at one time. It was strong enough to break u joints and after about a year of abuse the 7 1/4" rear end gave it up too. So I am sure the 50 extra cubes would be perfect for that light car.
I have been saving up and gathering info for a 300 six for build as well. With the right parts you can get right at 600 HP out of them.
So many combos, so little time.
CF-28 MK2,Mk3 / CF-29 Mk3 / CF-30 MK2 / CF-25 Mk1 ATI / CF-19 MK3/Mk3/Mk5 / CF-U1 Mk1,Mk2 / CF-M34 Mk7/Mk3 / CF-17 Mk1 / CF-07
Voodoo Envy M355 / M360 / M515 / M780 / U703 / Voodoo Hexx / Voodoo Idol / Voodoo Rage F1 / Voodoo Rage F1 / Voodoo Rage F1 "signed case" / Voodoo Omen
Alienware M11x R1