The raised exhaust port position means header choices can be problematic, depending on the chassis they are going into. Back in the day they were a decent head and you just had to deal with the header issues, but with so many standard exhaust port position heads out there now, which would you choose - the SRs that might require a custom header or something else? Been sitting on a set for a few years waiting to go into an a body, but am contemplating the trick flows because of the header availability and relative OOTB ability of them.