Agreed..

So the 348 could have been 400 HO or R/A..

To break it down...

1. 348 400 HO
2. 348 400 R/A with addition of 611 but not seen on billing
history with the 611 in the billing history.
3. 348 400 HO with 611 added in the billing history.
4. 348 400 R/A with 611 added in the billing history as a
seperate RPO

I do not know, as I have said in the past I am not a 69 Guru. What specific breakdown has been seen on the billing histories as it pertains for the above numbered 1-4?

I still say and still firmly stand by my opinion that if the internal engine differences between the 67 RA, 68 RAI and 69 "RAIII" are different, the 69 RAIII is not a true Ram Air car, rather a 400 HO with 611 open air inlet. The 67 RA, 68 RAI and the 69 "RAIII were all D ports. 67 and 68 had significant internal engine changes made to modify performance, designate them internally and in performance and differentiate them from, in 67 a 400 car and in 68 a 400 HO car. If in 69, there were no internal engine changes mandated or made, all the 69 Firebird with 611 is, is a 400 HO with Ram Air pans.

How else can you conclude this other than a sales tool?

Is there a difference between a 68 HO and a 68 R/A I? YES
Is there a difference between a 67 RA and a 67 400 YES
Is there a difference between a 68 HO 69 HO and a 69 "RA III" (other than the addition of 611) NO

GM had to call it something with the addition of 611. Still NOT a true RAIII car. If that were the case, I will add ram air pans to my 68 HO and call it a "RA II.5" rarest of the rare.

Again, GM NEVER intended to release a RA III car for Firebird. Somehow, somewhere all hell broke loose with what to call it and how (from 20 years of reading on the subject).