Even with a helper, I would do them separately, but that is just my preference. Lots of guys here have done it as a combo, with no problems, so it's 6 one way, 1/2 dozen the other. If you are doing this solo, why take a chance? Doing the combo deal also requires you to be under the car to guide the trans, while at the same time lowering the engine. That's kinda hard to do...at least it is for me...but I'm lazy.
You might get it all in with no problems, but....it only take one little boo-boo to ruin yer day.....
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Joel Adams
C3VR Lifetime Member #56
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"