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1989 Blazer S10 engine switch

First and foremost, I am fairly ignorant of all automotive engineering beyond changing my own oil, so I came here to ask youexperts. I have an 89 Blazer s10 with a 4.3LV6 with250,000+ miles on it. Would it be worth a rebuild kit or should I just get a new engine? If I need to just go ahead and get a new engine, should I make it easy and look for a new 4.3 or should I beef up to a V8? Which V8 would be best-suited for my SUV? What transmission would I need to get for this new engine? I'd really appreciate some input on this one. Thanks a lot.

RE: 1989 Blazer S10 engine switch

First off your 4.3l engine is not worth rebuilding to me they are only good for commuting around town. in my opinion you should just go to jegs.com and order a 350ci edelbrock engine part#350-45900. The best tranny would be a powerglide full length tranny part #890-73250436.