Correct engine color

[Matt13]

Just picked up a 340 long block. Casting date of 5/30/72. It's reddish-orange. From what I've read, it should be blue, correct?

[RUNCHARGER]

Correct.

[Matt13]

Thanks!

[340Rallye]

has it always been Chrysler corporate blue.  or, was there another name?

[6bblgt]

always been Chrysler corporate blue.

[Fish Tale]

What was the month again in 71 where they switched from orange to blue?  May/June?

[6bblgt]

it varied by plant and application (engine assembly: body - transmission - A/C?)
but:
GW340  (1971 Windsor) 340 engines are ORANGE
GM340  (1971 Mound Rd.) 340 engines are CORPORATE BLUE

[MoparLeo]

Here is some more info.
http://www.mymopar.com/enginecolors.htm

[6bblgt]

Here is some more info.
http://www.mymopar.com/enginecolors.htm

proceed with caution using that list for reference

doesn't show both ORANGE & BLUE for 1971 340s
HEMIs were "race HEMI orange" thru 1968
1969 was the first year for "street HEMI orange" (used on HEMIs, 383HPs & 440HPs)

[76orangewagon]

My 1971 Mounds Rd 340 that had a final assembly date of March 19,1971 was Corporate Blue..I found Blue paint on the exhaust manifold heat riser counterweight when I soaked it in Evaporust during disassembly.

[cudaize]

The engine, original to the car, in my 71 340 cuda with SPD March 31 is a blue mound road engine.  The engine assembly date is either 3500 or 3506, I can't make out the 4th digit for sure, the date would be Feb 26, 1971 or march 4, 1971.

[ScottSmith_Harms]

it varied by plant and application (engine assembly: body - transmission - A/C?)
but:
GW340  (1971 Windsor) 340 engines are ORANGE
GM340  (1971 Mound Rd.) 340 engines are CORPORATE BLUE 

This