Pick one and use the converter.
As you make updates and start making more power, sometimes you find that the SLR getting higher than about 10:1 can COST you ET, especially on a small tire deal or on a marginally prepped track or in a car that doesn't leave well to begin with.
Lot of variables.
On a turbo car, sometimes you'll benefit from "loading" the engine a little more, which can be done a lot of ways. Converter. Final drive. Trans gearing. etc. Notice I stressed "converter". It's important. Or on a manual shift, the clutch. A serious setup is not using a King Cobra, but something that's adjustable, which might be tough to get dialed in on a turbocharged car.
A lot of guys have found great success with a powerglide, which is basically leaving in 2nd gear of most 3 speeds. In theory it shouldn't work. In reality it does. Point being sometimes we can benefit from trying different stuff.
'92GT, 427" and '93 "LXVO" coupe