My 340 is pretty well sorted at this point, tuning etc. I have a true 9:1 motor, Lunati solid .526/.546 lift cam, port-matched LD340, big Thermoquad, etc. Cope built 518 OD with 4.10's.
My heads were ported/polished and really worked over by Bob Mullen way back in the day. (apparently he designed the W-2 heads?) I've been running 1-5/8" mid length headers that I made from...
Ported X head 340 header size?
