'79 Celica Oil Pan Gasket Options

[vandexa4]

I need to replace the oil pan gasket in my Celica.

The FSM says to disconnect idler arm bracket, disconnect two motor mount bolts and raise engine 1 inch.

1)Where is the best place to jack the engine?

2) I recently had the flange rewelded to my engine downpipe at the manifold. I'd hate to undo the shop's good work. Would I be putting stress at the joint?

3)Anything I should be cautious about? (crankshaft counterweights, oil pickup, etc?)