Hope this all makes sense to U' all.
Motor spec's are -
305 5.0L - SBC
casting #'s; 14093627 passenger rear side - no Honcho Mexico showing
suffix code; V0721 AKA, I know aka is a big block not a small block. That's what is showing
Julian date code; G188 or July 18, 1988
One piece Rear Main Seal
Roller Lifters, seen when Pan was off
Harmonic Balancer/Damper; 7" X 1.562
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Non OEM Assessors,
Heads; 14014416 both
Edelbrock Aluminum intake Performer
Accel HEI dizzy w/super coil 140003
Holley 4bbl. 1850 - 4160 vacuum secondaries, manual choke
Ram Horn Exh. Truck Kick backs
I know these assessors are not stock to the motor, just though to post them

Now to my question can anybody tell me what the motors RPO code would be with all the above motors information above the - - - - - lines or multiple dashes ? Or if more casting numbers are needed to positively identify it where would they be from all around the motor.
Thanks in advance for any information or links.

 

'416 heads on an '88? I thought the '416s were perimeter valve cover bolts:



The casting number is clearer in this shot:

 

My heads look exactly like them except mine are orange and doesnt have screw in rocker studs and also
they do have perimeter bolts. Also yes for casting numbers that spec out for years 80-99, 305 5.0L. Pocket book shows casting numbers are for 305 5.0L 80-99 yrs.

 

416 heads were discontinued in cars after about 86. GM introduced the ones with the center 2 intake bolts on each side at a different angle, along with center-bolt instead of perimeter-bolt valve cover bolts, in 87; then ones with the "Vortec" pattern in about 86.

The "ram's horn" manifolds AFAIK were last used in Vettes in the early 70s, after having been commonplace in MANY cars & trucks since the introduction of the SBC.

I couldn't give a rat's hindquarters about some "book" you found somewhere saying otherwise. The 80-99 claim for those heads seems HIGHLY suspicious to me no matter what.

I have no idea what might have remained in production for however long after 1986, for boats, generators, pumps, construction eqpt, or whatever else besides cars & trucks, however; so I could be blindsided by some such, if it exists.

Casting date code G188 means the 18th day of the Gth (7th) month of the year (July), in a year ending in 8. Most likely 1988. The head in Vader's pic for example, which I realize is not your parts, has casting date code J215, which decodes to the 21st day of the Jth month (the 10th one, October) of a year ending in 5; BY FAR most likely to have been 1985, in that one's case.

There is no "RPO code" for the "engine" you have. Not sure what value it would have for you, in any case, even if any such existed; that is, not sure what use it would be in making any decisions for its future, since "RPO code" entails a selection of intake manifold, carb/FI, distributor, exhaust, etc., none of which that you have, would have come in a vehicle all together as a complete factory-installed assembly. Especially not all those parts that aren't from GM to begin with.

You're wasting your time trying to find such a thing since it doesn't exist at all, and even more so, since whatever you might find, can't possibly apply to the specific pile of parts you now have, which include a WIDE variety of production dates as well as mfrs other than GM for which NO "RPO codes" whatsoever have ever been created.

 

It's a 305 roller block w/1-piece rear main seal.

Pad stamping V0721 indicates the motor was built at the Flint, MI plant on July 21st.
The AKA suffix doesn't show up for that motor. Are you sure of the 2nd or 3rd digit?

It may very well be one of these:
AKC, AKF, AKH, AKJ, AKM, AKN, ARA-'89 305TBI 170hp RPO L03

 

Hardly matters...

It's a 305. 1-pc rear main seal, roller lifter equipped. All anyone needs to know about that particular thing at this point in its life to characterize it COMPLETELY, as far as anything its "origin" can contribute.

It has already forgotten what sheet metal it was wrapped in initially, and like me about myself if I knew my origin, probably lacks the brain power to be concerned about it, even if it knew. One thing is FOR SURE though: it's not gonna decide to run or last or otherwise behave any different from however it does now (if at all?) whenever whoever tells it whatever that was, if ever.

Now, whatever MAY HAVE HAPPENED to it in the meantime, MIGHT have more bearing on the situation; NONE of which will be contained in any "codes". Things like, overbore, crank machining, the overall quality of the above, the pistons it was built with, the cam that's in it now, etc. etc. etc. ALL of which are FAR MORE important to its usefulness than any ancient "codes" stamped on it that no longer apply to it as it now exists.

 

Completely true, but OP may still be interested on the origins of the motor, just out of curiosity.

 

I only asked if a RPO code for the motor existed like L03, LB9 or L69 if these at all are RPO codes, also i asked if anyother numbers and letters anywhere else on the block could have other information about the block. Why does it seam like you have your panties in a bunch with me ???
One more thing the 305 motor was in my truck when bought and running like a Swiss Watch ! ! !

 

Here's a couple pictures.

 

The 305 motor was in my truck when bought and was running like a Swiss Watch.

 

Thank you for reading and understanding my postings and what I am after, it looks like " snowflake " is Confused.

 

Anything is possible for the right years block/bore and pistons used.
Yes my 416's heads are just like his Gray painted heads pictured with outer perimeter bolts.