Got my HP tuners and am now trying to get my car to idle and it is not going so well. So i hope someone can help me to get it right.

First some spec. on the engine.

PCM and engine originates from a 1998 Camaro but is now in my 1970 Chevelle
Ls1 block, stoked to 398
243 heads with bigger valves.
Cam is 222 int./224 exh. and 0.566 int./0.568 exh.
Fast LsxR 102mm intake
Drive by cable Holley Sniper 102mm throttle body
Longtube headers.

It made 414 whp and 580wNm at the dyno. So I have had it to a proffesionall tuner and he tryed to get the idle right but never got it even in the ball park because the TPS was reading over 1% throttle, but that was due to a ground issue that I have now fixed.

Problems I am having are that when I put it in gear it stalls or almost stalls and as I take it out of gear it revs up. And when in gear or revers it pulls realy hard, even so that it goes into second gear if i dont stand on the brake.

I se that the LTFT is at 25% for bank 1 but nothing for bank to also.

So, here is my scan and tune as I took the car around the block mostly driving it with the throttle closed as you can see.

Scan 27-06-2017.hpl
Tune 27-06-2017.hpt

Can some one point me in the right direction please or is there a machanicle issue I am not thinking off?