[curtis73]

Not quite. Think of it more like this:

-Cranks turned down to 305 main journal size, undercut and polished rod journals = $450
-Pisons for 305 = $75. Pistons for 307 = $350
-Stock 5.7" rods resized = $45
-Bore and hone (necessary for new pistons) = $150
-hardware, gaskets, oil pump, bearings, silicone

That's about $800 and that's conservative.

For the $800 you would spend on bargain stroking a 305 could buy (literally) three or four running 350s. This is the main reason why I NEVER recommend hopping up a 305. As soon as you buy an Edelbrock intake for it, you've spent more than you would on a 350 practiacally. And, if you do the 350 you'll have a motor that will respond to bolt ons much better than a 305 because of the breathing problems.

I get the argument all the time about "well, its what I have." That just doesn't hold water these days with how cheap it is to buy 350s. I picked up a complete running 4-bolt 350 with only 18k on it for $250. Keep watching the papers and Craigslist.

But... if its what you want to do, then do it. Its your car and your money, so have fun... but no matter what the case is, the 350 won't cost you any more and its a vastly better platform.

And, a 400 is externally identical to all other small blocks, so it will fit just as well as a 305 would. Absolutely everything will be a bolt-in swap, from motor mounts to headers, to starter, even all your wiring and sensors. The 400 is just a small block, nothing different.