Raising the SCR from where that motor is now is not necessarily a problem, IF you go about it intelligently.
True: raising the SCR does tend to lower the detonation threshhold. Which is why that motor is about 8.7:1 from the factory, rather than the higher than 9:1 ratio the NA motors were built at.
If you want to raise the SCR 'some', AND raise the detonation threshhold at the same time, then the way to go is to do the things needed to make your motor 'tight squish'.
....and the way to do that is to measure the piston deck height [done with the cyl head removed] to see how positive the deck height is. That motor ['93 and newer B230FTs] is very likely to have positive piston deck height of about 6 thou [0.006in]. i.e., the pistons top out at TDC about 6 thou above the block deck.
You have to measure and confirm the piston deck height. You do NOT ASSume what the piston deck height is: you measure it.
THEN, you order the correct thickness Cometic MLS HG that will result in giving you a piston to cylinder head clearance somewhere between 30 thou and 35 thou.
...usually a 36 thou MLS HG will do the job quite nicely.
Read up on the subject of 'tight squish'. It works.
You'll also need a way of adjusting/correcting the camshaft timing. i.e., an adjustable or re-indexable timing gear for the camshaft. Otherwise, going tight squish via a thinner HG will retard the camshaft timing, which is not helpful usually.
At least one heat range colder spark plugs is also required. I run two heat ranges colder.
TF