Need help wit pr3-1 head

[juicyj88crx]

I need help identifing this head i have no use for before i sell it. so i sell it propely It has a red valve cover with pr3-1 stamped in it.
Once i figure it out it will be for sale

thanks for the help in advance

[typercb7]

its a b16a head ill trad u my b16a2 with cash on top plz call me asap 678 832 3254