what upper pulley?

[KBR]

Hi....I'm thinking of going to a 2.76 upper pulley from the 2.95 I have now.
It seems like it would be an inexpensive way to gain a few more hp.
Please check out photo to see if you think Billetflow will fit on my hub?

The car has an Amazon Tuning pulley installed by PO.

mods in signature

The other route I'm considering is #4 lower kit, but may need more supporting mods for that ie boost a pump, injectors, MAF, heat exchanger

I'm hoping to eventually upgrade my blower, so any upgrades to fuel etc should keep that in mind.

Any input appreciated.

 

[KBR]

I did some thread searching and saw some people think early Amazon hubs may fit Billetflow and later ones Metco.

Photo certainly looks like Billetflow with 5 mounting holes. I believe Metco has 4

Thanks again for any info