1991 k1500

Hey all how goes it.

I have a 1991 Chevy k1500 that I'm going to drop a 454 in. I am wondering if headers for a 3/4 ton would fit in my 1/2 ton on that 454.

I'm having a hard time finding headers for a 454 that say they are for a 1/2 ton because the 1/2 ton wasn't available with a 454 new.

Thanks for your help.