AA Piston and Cylinder kits

[BBShriver]

I was looking at an AA Performance products piston and cylinder kit. JE Forged pistons,

PISTON: 84mm FORGED JE PISTON***
COMPRESSION HEIGHT: 34.2mm (1.347")
PISTON TOP: 11.5mm (.453")HIGH COMPRESSION DOME TOP
ENGINE TYPE: PORSCHE 911
ENGINE SIZE: 2.2L AND 2.4L
CYLINDER BARRELS : ALUMINUM CAST IRON SLEEVE
PISTON RING: HIGH PERFORMANCE RING TOP:1.5mm 2nd: 1.5mm OIL: 4mm
MANUFACTURER: AA PERFORMANCE PRODUCTS

Does anyone have any experience with these components? What would "going price" usually be? What CR would that end up as in an otherwise stock 2.4 CIS? Would this cause problems with an otherwise stock 2.4? Need to do dual plug etc to offset?

I'm working on building up a 2.4 for vintage racing, the higher CR and forged is nice, I like the iron cyl walls (rather than nikasil), just trying to figure out how the geometry works out on these. I'm thinking about doing the dual plug anyway, but as I understand it the main benefit of that is higher CR.

Thanks,