Procharger d1sc advise
Putting 317s on it would be a big mistake... It would send your already low compression (9:1) even further into the crapper.... Not to mention less flow over properly worked 243s.
I would put the 3.4" pulley on it, retune it on meth and wait for winter air... 9.80s no problem.
Personally.. I wouldn't even pulley down right now, I would just continue tuning it at the track and wait for good air.. If you don have meth on it, definitely do that and tune it first.
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