Clutch fork length

So I am putting together an early A slant six /833 combo. I have the "2463027" 9.5 inch bellhousing. According to brewers, it calls for a slant six clutch fork with an overall length of 10.5 inches.

However, I checked my stash and all I have are V8 ones with an overall length of 12.5 inches.

Can I use the longer one on the 9.5 inch bell or will it create more problems than it's worth??