Yes, you'll have garter stitch for the first and last 4 rows, and the first and last sts of the other rows. But rows 5 to 73 have a mix of knits and purls on each row. Mark row 5 as the RS, just hang a paper clip or safety pin on a stitch and you know that's going to be an odd numbered row every times it's facing you.
Row 5 begins with k9 which is the 3 edge sts, then 6 knit sts, then you p2 and (k6, p2) 4 times across the row, ending with k3 for the garter edge.
Row 6: begins with K3, then you P1, K2, (P6, K2) 4 Times, P5, K3 edge sts. The p5 will be the back of the k6 from the beginning of row 5, so those should show as stockinette st. The k6 p2 repeats will be a little offset I think, but eventually will show a sort of garter rib pattern. Sometimes it takes a few inches for the pattern to look like it should, so just work on it for about 10 or 12 rows after the beginning garter rows then see what it looks like.
sue- knitting heretic