Wondering if the stock injectors can be replaced with the Ford 19# injectors. (stock 87 305 tpi) Also, I see several styles around here and there. Does it make alot of difference? Any preferences in brand? Is there anything wrong with buying them second-hand, what to look for, etc.?

 

You can put the Ford SVO injectors in, but keep in mind that they are rated differently than GM injectors and at the GM prescribed fuel pressure ratings will be more like a 21# or 22# injector. You may need to back the fuel pressure down a little if you go that route. Buying secondhand is "ok", but you would benefit if you had them sonic cleaned and flowtested just to be safe and for peace of mind.