i have a question can i use a 350 auto chip and adjust the minimum air rate or will it continue to give me problems now that it's a 5 speed?the 305 5speed chip works wonderfully but i noticed there is a lack of power up top where the 350 chip doesn't fall off(pulse width maybe)at all but is very harsh at idle up down up down etc.above 1500 the 350 auto chip is fine anything below it and it's a really bad idle what do you guys think?

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87 trans am 350 L98 aluminum heads,LT4 hot cam,slp runners,headers,y-pipe,edelbrock base,hi flo cat,air foil,ported plenum,t-5 tranny w/centerforce clutch and a 3.27 9bolt,ads strip chip,relocated iat sensor,hollowed maf

14.10@97mph w/2.01 60' 4SALE anyone want her?

 

STOP.
Neither are for the AL heads!
They take a totally different advance curve.
You need to get into prom burning to get that combo right.
The AL heads (small chamber) make best power at like 26-28d timing.