Ah, should have read CRE's supramania link first...
So with a stock gasket being 1.37mm, you are losing about .4mm of space between block and cylinder head with your current setup (1.4mm hg, .006 off block, and .017 off head).
In order to be closer to stock compression ratio and clearances, you would need something closer to a 1.8mm mhg.
******EDIT******
After reading quite a bit of the thread linked earlier by CRE, there are several reasons why it would be less than ideal to reduce the distance between block and head. From what I've read, buy a 1.8 to 2.0mm head gasket and do not reuse your existing 1.4mm
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1989 7MGTE R154 Targa Top White Package w/Blue Interior
Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels
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