Took me 10 mins to locate the following remans
200 6cyl complete long block $1545 and $235 back after return of core from Power Pro 2000 engine rebuilders
200 6cyl complete long block $1395 and no core charge ATK engine rebuilders
200 6cyl complete long block $1826.25 with core exchange Jasper engines
and this...
1970 FORD MUSTANG ENGINE -- 70 FORD MUSTANG ENGINE block#C8DE-B Head # C9DE-M from REBUILT-AUTO-ENGINES.COM
1970 FORD MUSTANG ENGINE comes with cylinder head attached and valve train installed. Remanufactured engine long blocks have NEW valves, valve springs, valve keepers, push rods, rocker arms, fulcrums, lifters, camshaft, timing chain (belt), timing gears, valve guides (diamond honed), three angle seats, cam, rod and main bearings, pistons, piston rings, rod bushings (if applicable), gaskets and oil pump. Our 70 FORD MUSTANG ENGINE long blocks are REMANUFACTURED not just REBUILT! L6, 3.3 L, / FORD 250 cid,NON TURBO, GAS ENGINE Without smog, 1 3/4" carb throat for $1080 w/$150 deposit on core.
So there you have just a few....I aint supporting them..just letting you know what is out there for a rebuilt long block...
Now if you want something racier..then add another $2K for the hi-po stuff (like dual timing chain, domed pistons, special cam, roller rockers, headers, ARP bolts, etc.) and you are back at your original quote. Even more than that if you are going to use the OZ or ARGY heads with two or more carbs!