last one i did was very small compaired to the one your looking for.
i ended up finding a used one they we where doing a new system in. i took it off that job, cleaned it up, fixed it up and installed it.
what about someplace like Johnson air. they sell those huge air rotaions units etc.
Junk Yard Dawg set up, stock motor, stock ls6 heads cam only. 9.32 @ 142 on 200 shot 1.39 60' (best 60 with this set up was 1.31)
427 LSX 250 shot 8.7 @ 155 (9.7 @ 141 NA)TEA Trick flows!!
Old setups- 346 300 shot 9.40 @142 402 9.0 147
EAST SIDE Performance, Nitro Dave, speed inc, dyno tune, TEA (for a sick set of heads) etc
other rides: 03 Z06, 72 chevy P/u, 08 2500 hd D-Max 6.6, 86 Harley.26' Checkmate ZT NOYZEE RACING!!!