Hilborn,but can you tell me what this one is for

First of all I know it is a hilborn unit.It has s part numer that is 303-C 8B(8?)not for sure on the last letter.I have had it for a while and never had any luck finding out what it may be for.I will try to post a couple of pics.

On the sides of these it has''Hilborn Injector,Los Angeles.Any help would be appreciated.

Looks like Pontiac to me

Fuel injection for an early Olds. Here is a link to 5 pictures of it setup on an Olds motor.

http://public.fotki.com/oldsrocket/supercharger-and-in/hilborn/bnivgwkkgrhgookjuej.html#media

Thanks,now all I need is an Olds motor to put it on lol.

I believe I read at one time that this was made for the 303, 371, and the 394.

Look under 1949 to 1964 (doesn't talk about the Hilborn just the motors)

http://www.442.com/oldsfaq/ofeng.htm#Engines%201949%20-%201964

Good eyes Cratethis. Early Pontiacs had that staggard bolt pattern. I was looking through some pics trying to figure it out. Early Olds never dawned on me. I was looking at everything else. It sure looks cool in that link picture.

What would this thing be worth,not trying to get rich,but don't want to give it away

It really depends. There aren't a ton of people out there building Olds blocks, especially the old old ones. This would be one of those pieces that you are going to have to be patient and find the right buyer. Defiantly look for Old's specific forums to post it forsale on.
I've seen people try and sell them for $500 to $1500. Do you have the stacks with them, or just what is in the pics? There is also the valley plate that would have been apart of the "kit" and a few other things. If you only have what is in the picture then you'll probably be under the lower end. You'd be looking for that person that is needing parts to help make the one they already have work.
I know that is probably not much help, but I hope it gets you started.