Iac zero,block learns at 160 at idle.

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I have block learns at 160 at idle and iac at zero. I have 30 pound svos and maft translator installed to correct for them. I have also been getting inconstistent readings with my scanmaster car seems to read low like .853 on one 1/4 mile run but then .875 the next and sometimes get knock and sometimes not. Sometimes get stupid o2 readings like .653 but no knock. Yet when you watch the scanmaster you dont' see any stupid low readings .
Sometimes get knock when part throttle and sometimes not. Usuing 91 octane fuel currently.

Also my block learns are 160 at idle .Should I move the maft richer or leaner on base. I so far have no check engine light showing. And my iac is showing zero at idle yet the car is idling good. The car previously was idling terribly erratic and showing counts of around 35. But when it was idling bad it was on stock tb. I swapped in a bbk 52 and tried to clean my iac valve before reinstalling it. My idle also was very low with my stock tb..it seems quite a bit higher with the bbk. Not complaining about that though just worried the 160 block learns are maxed out lean right? So I should be adding more fuel on the maft base dial. Is this why my readings thru the quartermile are still not making total sense with sometime reading perfect around .890 and then sometimes reading .853 even with no change made on the maft. I have checked fuel pressure recently and it looked fine at idle and wot. I have changed fuel filter out and my injectors were very low mileage used ones off the board.
Am I supposed to watch the block learns at idle or at steady non wot open speeds like 60mph? I lost my maft manual.

Posted this awhile ago but still need some help.I got maft manual off the lt1 boards and it doesn't seem to offer any suggestions on setting the car to 30svos.
Also my iac is like 23 counts at idle now.Car is very touchy when you give it gas maybe from not adjusting tps enough forget what it reads have to double check ,What is good reading for the tps?
My car sometimes surges up and down at idle also. But main problem is car is not running consistent .It will run 98.9 mph one run and 93 the next and as said the 02 readings are very all over the place from 890 to 840s and yet have tested fuel pump pressure at idle and wot. It help steady. Can't figure this darn car out.
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99taws6:lid,holley filter,gms maf,MtI tb,ls6 intake,B&B,
b1 cam,asp balancer,racetronix pump,hotchkis