Need Bench seat floor brackets...

[Cochise]

for a '70 C-10. I bought a "new" seat that was welded to another cab, so I used the brackets from the '89 chevy model's bench seat to bolt the "new" seat in, but the '89 model brackets make the seat too tall, and the holes are too close to each other in the floor. If the above post makes no sense I apologize, I no explain good.