70 Judge RAIV and V continuation - Page 20

**sixtiesmuscle** · #**191** 12-02-2003, 07:59 PM

According to McCarthy's book the RA V 428 used the same block casting as the early 400, 9792968. I'm wondering if the 545687 could be the designation for the early 400. Again, according to the book, the 428 would also be cast 545887. I suppose typos do happen, so, I'm hoping someone has more info. If your 428 is that same casting number, does it have the extra webbing in the valley? Why does my block have both of those numbers, one cast & one stamped??

Steve_Hoog · #**192** 12-02-2003, 08:19 PM

That is a negative on both of the blocks I have, just regular webbing.

The guy that just gave me the last RAV numbers has two of the crossed main cap 428's, he is suppose to get the numbers for us. That could shed some light.

**tjs44** · #**193** 12-02-2003, 10:29 PM

Steve,as far as I know and have seen there were no large jurnal RA V parts,the 428 block was a stock block with angled caps.ALL the TRUE RA V cranks I have seen and owned were 3in mains to go in the RA V block.I owned a Kellogs 4in stroke and do own a Kellogs 4.21 stroke.WHY use a 428 block, when they could have just used a a 455 SD block and used the same 990 forged 4 in stroke crank.I really believe the 428 block was just used to test components.I know the one that Lance had was VERY broken up.It goes along with what I said earlyer about the MANY developmental parts that were out there.Have been told there were only 3 4.21 stroke 3in main Kellogs cranks made,a few more 4in stroke.FYI,Tom

Steve_Hoog · #**194** 12-02-2003, 10:34 PM

Tom

This is way out of my league, I can only go on what you and Lance say. I just called it RAV to be calling it something, it's definitely not a normal motor if it has crossed mains.

The numbers Lance has may help Mike, I don't know. I'm going back through my books tonight, but I don't ever remember seeing anything like Mike posted.

Steve

pontiac6269 · #**195** 12-03-2003, 12:02 AM

The numbers on the front of the block are part #. Numbers on the back are the casting #. 1969 numbers are, part #545686, casting #9792968. 1970 numbers are part #545686, casting #481708. The ram air experimental 428 block is cast GME 9792968 and stamped RA-38. Angle bolt428 block cast #545887 dated (F309)June 30, 1969. All Ram Air V blocks would have a distributor hole that is larger then all other Pontiac blocks.

**tjs44** · #**196** 12-03-2003, 01:18 AM

Super duty 455 blocks have the larger dist hole also.FYI,Tom

Steve_Hoog · #**197** 12-03-2003, 02:13 AM

Totally my bad on Lance's motors, he did say that he let go of the torn up block. That may have been the 428. His others are 400's.

Mike... I am on page 214 of McCarthy's Performance book. There is a 400 block he talks about with "545686". Very close indeed. I think some of the info that pontiac6269 guy posted may be right off this page.

My question would be, do the production numbers run sequential on your block like the WY's I've been getting info on. Difference may just be the year usage intended.

**sixtiesmuscle** · #**198** 12-03-2003, 01:18 PM

Thanks, but, still no info on a part number 545687. Any idea what that is? There are no other numbers on this block.

JLP · #**199** 12-04-2003, 02:54 AM

Can't help on the # you gave. However, most of the other numbers are here. It is regarded as a good web site for pontiac number crunching info. It has the 2 letter codes for the RA V but no casting #'s.
[img]/ubbthreads/images/graemlins/frown.gif[/img]
http://www.wallaceracing.com/cgi-bin/engine3.cgi

Steve_Hoog · #**200** 12-04-2003, 03:53 PM

Tom

Just had a guy email me that has 2 blocks stamped "DS 1941A". That sound like an over the counter bare block V?

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars.