[bulletpruf]

Fellas

Long time no see.

Buddy has a 4 bolt 400 block. Said to come out of a 69 Judge. Don’t have codes yet just saw pic of bottom end.

I can’t remember - did any RA III come with 4 bolt mains? Or only IV?

Scott

['ol Pinion head]

factory '69 usage RAIII blocks were 2bolt mains.

[tom s]

70 RA IIIs were 4 bolt caps along with RA IVs.Tom

[Joe's Garage]

All of the Service Replacement (SR) 400cid blocks we've handled had 4-bolt mains, although I believe they were produced both ways.

I think Pontiac figured that if you managed to break a 2-bolt block, replacing it with a 4-bolt block might be a good idea.

As Tom S points out, ALL the factory 1970 Ram Air III and IV engines had 4-bolts. In 1969 it was only the RAIVs.

But Pontiac was always nice enough to produce something that challenges any absolutes we thought were undeniable.....

[Douglas Willinger]

Some 1970 model year Ram Air III engines have the 9799915 block (9799914 with the 4 machined away and replaced with a 5), with the WS (manual) stamp on the front.

My February 1970 Lordstown produced 4 speed M-21, blue/blue deluxe interior TA that I have owned since 1979 has that, with the W well stamped but the S more faintly stamped. Block's casting date is early January.

[Tellyshavilli]

Originally Posted by Douglas Willinger

Some 1970 model year Ram Air III engines have the 9799915 block (9799914 with the 4 machined away and replaced with a 5), with the WS (manual) stamp on the front.

My February 1970 Lordstown produced 4 speed M-21, blue/blue deluxe interior TA that I have owned since 1979 has that, with the W well stamped but the S more faintly stamped. Block's casting date is early January.

Lordstown produced 70 Ta ?

[johnta1]

He probably sees the 'L' figuring it's Lordstown?
(L is for Van Nuys )

[Douglas Willinger]

I stand corrected.

Was going from memory.

My 1970 Trans Am has the "N" - Norwood, Ohio.

https://www.hotrod.com/articles/norw...plant-reunion/

https://www.chevy-wiki.com/wiki/Norwood_Assembly

Yes, "L" is Van Nuys.

Question- how did they get an "L' designation, rather than say "V".

Originally Posted by johnta1

He probably sees the 'L' figuring it's Lordstown?
(L is for Van Nuys )

[bulletpruf]

Block is now for sale in classifieds here.

Thanks

[bulletpruf]

Thanks fellas. I’ll post the #’s when I get them.

[napster]

Bulletpruf,

Welcome back. Look forward to your future posts. Always interesting and educational.

BTW, thanks for your service.

Jim

[bulletpruf]

Originally Posted by napster

Bulletpruf,

Welcome back. Look forward to your future posts. Always interesting and educational.

BTW, thanks for your service.

Jim

Thanks, Jim. I appreciate it.

Scott

[bulletpruf]

Ended up with:

4 bolt 400 WS, partial VIN 20Z137XXX - Fremont built, which makes sense. Motor is said to have come from Albuquerque NM.

2 bolt 557 WT block, partial VIN 26N524XXX

6X Heads, November 1976 dated, stamped 4 (100 cc chambers)

9773524 Nodular crank, late 1967 400

4813 Nodular crank, 71-74 400

16 heads, July 1968 dated, 400 or 428 heads, 72-75cc.

Will be listing everything for sale except for the WS.

thanks

[bulletpruf]

Originally Posted by bulletpruf

Ended up with:

4 bolt 400 WS, partial VIN 20Z137XXX - Fremont built, which makes sense. Motor is said to have come from Albuquerque NM.

2 bolt 557 WT block, partial VIN 26N524XXX

6X Heads, November 1976 dated, stamped 4 (100 cc chambers)

9773524 Nodular crank, late 1967 400

4813 Nodular crank, 71-74 400

16 heads, July 1968 dated, 400 or 428 heads, 72-75cc.

Will be listing everything for sale except for the WS.

thanks

Sold everything except for the WS block.

Heads ended up being 15's, not 16's. I think these are the ones Cliff R prefers for his iron head builds.

PHS has been ordered. Should have it tomorrow.

Thanks

Scott

[HUMBLER]

Numbers yet? ;-)

[Brewster]

Right, I guess Im not the only one looking for their correct lost 1969 RAIII motor.
Oh please, Oh please, Oh please be mine

Humbler, are you the Craiglist searcher?

[bulletpruf]

Guy was told that it came out of a 69 Judge. If so, perhaps it's a IV block. We'll see.

[north]

I believe the L for Van Nuys signified Los Angels but just a guess.

Factory literature indicates even the base GTO 400 with manual trans (WT) was four bolt main. I don't know if this was actually the case in production.

[Joe's Garage]

Every one of them had 2-bolt main caps.

And ALL of the 1970s were drilled for 4-bolt mains, but had 2-bolt caps. The 1969s did not have the extra holes drilled.

But you never know what Pontiac might have done.......

[muscle_collector]

Originally Posted by Joe's Garage

Every one of them had 2-bolt main caps.

And ALL of the 1970s were drilled for 4-bolt mains, but had 2-bolt caps. The 1969s did not have the extra holes drilled.

But you never know what Pontiac might have done.......

if you go to the other thread this has been discussed recently and I posted pics of 2 69 WS blocks that were drilled for 4 bolt but with 2 bolt caps. I have had several WT code 69 engines that were the same way drilled for 4 bolt but with 2 bolt caps.