Hello Don, The manifold was purchased with the motor and is a small port Offy just powder coated. The build is comprised of a 409 crank 6.135 BBC rods, Ross Pistons, 10.2:1 Schneider cam-hydraulic 226/228 @.050 lift at .520”-530” on 110LSA, double roller timing, 409 Pan, two piece timing cover (show cars) Melling oil pump and 079 heads (i know) with 1.7 roller rockers and offy valve covers. i am sure i am missing something and any input is welcome!