I have a 227/243 LSR in my 438 and it drives better than stock. I can run in 6th at 40mph and 5th around 35mph in town no issue. It pulls from a stop in 3rd at 800rpm.
I would run the 231/247 comp if I ever needed a rebuild. The LSA is ok IMO. Tighter will lope more, but the extra durations will do that anyway. It looks good to me
With a good tune I recon it will be "close" to stock.
Go for it