what kind of troubles will i encounter installing a left side oil dipstick 350 block as opposed to the right side which of course my car came with. tom

It's not that big a deal. You can abuse the dipstick tube into place, or you can get a flexible aftermarket replacement one, like the one from Lokar.

The dipstick itself is going to be your only difference between the 2 motors. And like ape said you can either motivate the dipstick into place or buy a replacement either made to fit the specific L/R side or a flex one.

ok, what if I have the same as original post, but my original block was one piece seal, would a 2 piece seal work?

Yes

so it also looks like I have a large crankshaft journal, and this block I just bought is designed for a small journal... Do I just buy a new crankshaft with a small journal, or am I screwed and need to sell the block I just bought and buy a block designed for a large journal?

What block did you get?

That's not a small journal block.

http://cgi.ebay.com/ebaymotors/ws/eB...=STRK:MEWAX:IT

here is one I think I have. if you look at the second picture from the top the very bottom piece, that seems more like the piece I have. I will make a youtube video real quick for you. Thanks so much for helping me.

A 1 piece RMS block is definitely not a small-journal block.

That's the difference in 1 piece and 2 piece rear main seals... nothing at all to do with journal size. (Except of course that there are no different journal sizes in 1 piece RMS blocks.)

so then I need to buy a one piece main seal crank shaft?

For a one-piece block, yes.

so then the shaft is all I need to buy then? the heads will fit and pistons and everything else?

The heads will fit any block. Pistons will fit if you use the same bore, stroke and rod length.

Need a 1 pce seal oil pan if you don't already have it