Truck 5.0/Tranny for 70 FB Conversion

[TomM 25]

I recently purchased at 70 FB roller.  I"m keeping my eyes peeled for 289/302/5.0/351.  My preference is to stay close to period correct but not a requirement.  I see quite a few 87-93 5.0/C6 or manual combos out there from pickups or Broncos at reasonable prices.  Is there any reason I should pass on those or are they suitable as long as you deal with exhaust manifolds etc that may be different from an 87-93 Mustang, in addition to the usual oil pan, timing cover, etc mods.  I had started a similar thread in March but could not locate it.

I prefer something that is currently running (although not necessarily well).

Thanks, Tom