67 rallye bezel with modern gauges question...

Currently my , now getting painted, barracuda has my DIY dash bezel installed and after much 'humming and hawing' I've decided she's worth more to me. I'm not completely happy with the results. I can take a second attempt but If I'm honest I've always loved the original dash on these cars, so I am thinking of buying a re pop from PG and installing newer gauge kit. However, I do not know the size of the original gauge holes..
Question is, will these 3 7/8" gauges fit or will I need to fabricate something?

https://www.speedhut.com/kit/GRM4-DUAL-GPSQKIT-ST-03T/2-gauge-custom-set---Dual-Gauge---200-Km-h-GPS-Speedometer---8K-Tachometer,-Quad-Gauge

Anyone know a reason why I wouldn't do this other than the obvious which would be to maintain original.
I would love to have everything original but not sure that is practical or how expensive that might be.