Where'd my 1st gear go!?

I got the car running today for the first time in about 3 years, backed it out of the garage, put it in 1st and nothing....second and third seem to be there but no first.
The tranny is freshly rebuilt, reverse manual valve body. The fella that built it is top notch and I have 100% faith it was done right, could it be an adjustment issue. I've heard of not having enough adjustment to catch third, but second and third are there, as is reverse, but second doesn't seem to have any power either...any suggestions? I believe the convertor is maybe a 3000 stall...