Thank you guys.
I never was a truck guy, so my confusion came when which engine was the correct one... I trusted the one that came with the kit ( there was nothing I could do tbh).
Despite not being the correct one, I still love the truck and maybe since there are tons of aftermarket parts for trucks, maybe an updated engine wouldn't be a bad call.
And again, thanks for your info Hakan, I won't be fooled again ?