To convert a stockinette stitch sweater to the round, you've got the right idea. You can take 4 stitches off the total cast on to account for the stitches used in seaming, and you're good to go.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry