If the casting is as ruff as the IHI or 366 I have plus the restriction of the pedestal where the up pipes bolt to it will help out alot.
That was the first thing I noticed with my BD pedestal when I installed my turbo, how small the up pipe ports were; it screams porting/polishing
. I was going to port/polish it before install but I didn't have time due to other things I was working on.
This summer I'll be removing my 366 for a complete port/polish job; intake to pedestal to see what gains it get followed by ported/polished exhaust manifolds, including LML manifold.
If you want to email me pictures Damian feel free too,
[email protected], or go over what I can do, again just let me know.
Yellowchevy