BUILD DATE CODES what would be correct for my rr ??

[rav440]

my road runner was built on march 08 73 i have 3 HP exhaust manifolds the the dates on them are are 12-27-72 the best looking manifold , 2-23-73 and 3-25-73 the last one isnt going on the 440 because its after the build date of the rr my question is would the 12-27-72 be correct ?  or would the be way to early to have be used ?

thanks RANDY 

[69CoronetRT]

What is more important that the car SPD is the engine assembly date.

On what date was the engine assembled?

The engine assembly date is probably around 10 - 14 days ahead of the SPD making it late Feb. A DEC mainfold date sounds like it might be better than the Feb manifold.

[hemigeno]

What is more important that the car SPD is the engine assembly date.

On what date was the engine assembled?

The engine assembly date is probably around 10 - 14 days ahead of the SPD making it late Feb. A DEC mainfold date sounds like it might be better than the Feb manifold.