High Performance Pontiac
Click here to find out more!

9799914 or 481988

  
High Performance Pontiac
Item Posts    Sort Order

9799914 or 481988

 
wallyd246 wallyd246
New User | Posts: 19 | Joined: 02/13
Posted: 06/05/14
08:38 PM

anyone have any info on the 9799914 Pontiac block? I am having a 468 stroker built again and I know that the 481988 block is strong enough for the build, but I don't know much about the 9799914 casting and have the choice between the two.  

bigD bigD
User | Posts: 126 | Joined: 05/14
Posted: 06/05/14
11:07 PM

Icon Quotewallyd246:
anyone have any info on the 9799914 Pontiac block? I am having a 468 stroker built again and I know that the 481988 block is strong enough for the build, but I don't know much about the 9799914 casting and have the choice between the two.

The 9799914 looks to be a 1970 block. If it has 4-bolt mains it's a RA3 block and worth $$$ to restorers. The 2-bolt appears to have also been used in 330hp Birds and 350hp Goats. So it may be worth more for a numbers matching build than for your stroker. I'd use the later block and try to sell the '70 for a resto build. The other number is a '71-'74. Either should be just fine for for a stroker build.

http://www.pontiacpower.net/engcast01.html  

shyrgfuh3 shyrgfuh3
Enthusiast | Posts: 448 | Joined: 11/13
Posted: 06/06/14
03:25 PM

if they are near the same price and the same bore i would take the 4 bolt.

also, i would have the cylinders sonic checked for thickness first. they can be thin from rust in the water side or from a core shift.

a 400 block can purportedly go .060" over but a 455 purportedly can only go .040" before it has overheating probs.  

wallyd246 wallyd246
New User | Posts: 19 | Joined: 02/13
Posted: 06/06/14
09:14 PM

ya I have learned that the hard way with a 500557 block. 480 miles blew a head gasket so I had the engine taken apart and sonic checked and got terrible numbers back. So now I'm doing it again. But insisting on a pre 73 block. Still not sure how it's all going to turn out.  

wallyd246 wallyd246
New User | Posts: 19 | Joined: 02/13
Posted: 06/06/14
09:18 PM

Thanks, that pretty much what I have been coming up with also. I don't have  the blocks just have the option from a builder.  

shyrgfuh3 shyrgfuh3
Enthusiast | Posts: 448 | Joined: 11/13
Posted: 06/06/14
09:37 PM

hi;

they still should be sonic checked though. let us know if you need build suggestions. bad advice freely offered, lol.  

bigD bigD
User | Posts: 126 | Joined: 05/14
Posted: 06/07/14
03:00 AM

Icon Quotewallyd246:
anyone have any info on the 9799914 Pontiac block? I am having a 468 stroker built again and I know that the 481988 block is strong enough for the build, but I don't know much about the 9799914 casting and have the choice between the two.

I tried to post this last night, but could not make it post. Anyhow, here's a chart with the 2-letter engine codes that tell what HP motor the block came with. Since you say you don't have the block yet, I'd check the 2-letter code. If the blocks are the same price and the '70 block is from a Bird or Goat, then I'd go with it. That way if you ever decide to sell, it will be worth more for numbers matching builds. But if it's from a 2-barrel or other low performance app, then it's worth no more than the later block. I think all 1970 400 engines listed at 330hp and above came in Birds, Goats, T-37's, GT-37's or GP's. But I'm no expert. I could be wrong.   Smile

http://www.classicalpontiac.com/cgi-bin/cp/global/engine.cgi

Here's another chart of 2-letter codes for '70 Pontiacs.

http://ronspontiacpage.com/reference-pages/1970.htm