It's seems most guys on here are using 75W-90, since yes it's very close, and the only I can find locally.

As to needing a second person... There isn't enough room under the car to tip up a bottle like there is in the rear. I had no problem changing the diff oil by myself using a fill tube with a shut off valve in it. For the trans I drained it while on the lift, then lowered the car to about one or two feet off the floor. My fill tube has a smaller diameter plastic tip with a cap. Well that worked great to add a section of vacuum line for an extension. I think we used about another two feet of vacuum line. My buddy then held the oil bottle/fill tube valve up over the engine while I fished the tube into the fill hole, and watched for overflow. I then stuck a bolt in the tube to keep from dripping oil (especially on the second bottle still containing some oil) all over me and the car while he pulled it back up.

I hope that makes sense... It really was quite easy.

I can't seem to find the fill tube I used, but it's just like the one in the following link without the funnel. It threads directly onto the oil bottle. I got it at Autozone. I've always just used vacuum hose, since it slips over the tip of a gear lube bottle, but the guy there suggested this, and I'll never go back to hoses...

Hopkins/Measu-funnel with on/off spout, handle, pouring tube and cap (10704) | Funnel | AutoZone.com