The FRST bottom end wasnt available as it had a big hole in it

Ive got everything else!
I wanted to use my bottom end as its not got many miles on it as it had a re-build a couple years ago,arps ect!
Im asuming i can just bolt on the FRST head, inlet ect to my s2 bottom end without the need for spacers ect?
Any ideas on the CPS then?