You can build a mean 305, but unless you want to do it to be different the cost will be similar to a 350… which will ultimately make more power because of the displacement difference. I went with a 350 as a result. Functionally an 88 v 90 block isn’t all that different (As I recall there is a block off plate for a manual oil pump on an 88 which isn’t present in the 90 or newer block… really is of no significance.) what you will want it’s a complete tpi setup and you need to know the year of the setup because it makes a big difference for tuning (Different year TPIs have different computers and slight differences that you must know about)… If you can pass smog in your area with a stealth ram, it will give you more power and an easy tuning platform. So my advice is just go with the 350, and you can get a good price from these guys… I have ordered from the first link (good price and engine runs great)… second link is a competitor that is worth looking at.
http://www.rebuilt-auto-engines.com/ http://www.cmengines.com/?gclid=COjn...FSAhDQodGFEZpg