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#1
02-20-2006, 04:37 PM
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RAM Engine stamp
I have a '70 YZ code motor - H219
#12 heads - H089 (both) Intake 9799068 - H079 Exhuast Manifolds were to said to be original - cant get numbers yet. So all appears to say RAM III. However, the block stamp is 9799915. The 4 has been removed and a 5 stamped. Given the heads and intake numbers would this be a RA III or RA IV? |
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#2
02-20-2006, 05:17 PM
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Appears to be a RA III, but Wallace Racing lists 13 heads for a 1970 RA III, I believe that to be incorrect.
Here's what I copied from Wallace Racing's engine search results: Year Engine HP Engine code Trans CR Cam Head Code BBL Carb No. Misc 1970 400 366 HP YZ A 10.5 068 13 1-4 7040270 RA III Block Casting 9799914 Hope this helps!
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Regards, "455HO" Lloyd 2008 GMC Sierra Denali 2WD Crew, L92 6L80E, Silver w/ Ebony guts, 14.26 @ 98 
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#3
02-20-2006, 05:24 PM
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Thanks for the feedback.
As for the heads, I think #12's were Auto and #13's are for M/T... |
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#4
02-20-2006, 05:24 PM
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12 or 13 heads are correct for a 1970 RAIII. The 13's were used on automatic cars, and the 12's on manuals, from what I have read.
The intake also is a RAIII (or, generic 1970 4-barrel) intake. In no way a RAIV. |
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#5
02-20-2006, 05:27 PM
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Good to know TJH - believe I found a listing somewhere calling the intake out as RA III.
I know the heads and Intake are RA III parts, I was just a little confused by the 9799915 instead of the 9799914 stamp. |
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#6
02-20-2006, 07:49 PM
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This has been discussed in detail in previous threads.
I have never seen anything but "12"s used on a 1970 YZ or WS Ram III engine. I have both YZ and WS engines that were pulled out of orignal numbers matching cars, and they all have the "12" heads. Mike |
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#7
02-20-2006, 08:18 PM
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Quote:
All the original 70 YZ and WS engines Ive ever seen had 12s. As for the block casting number, I have a 70 WS with 979991(5). I have seen in other posts where other people have 9799915 RA3 blocks. Speculation is maybe there was a shortage on 4 bolt 914 blocks which was filled by using 915 blocks stamped with appropriate RA3 codes. I bought mine as a bare block so I cant comment on if it had forged pistons or not. |
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