You can get water pump spacers.

You can do it all bolt-on parts if the timing cover from a LT1 will fit on your engine. I have no idea if it will fit or not, but if it does you can then add the cam/cover/opti-spark etc to get the...

It's probably too much work to convert. But then, I believe the LT1 timing chain cover will fit an older small block but can't say if the Opti will fit under an older water pump. You'd want the newer...