I have a 4dr 82 chevy with a 305 sbc that struggles. I was wanting to drop in a bbc but am unsure of all my accessories. I have a great alternator and a/c compressor and power steering pump. Would I have to buy different ones or different brackets? and would I have to change the motor mounts? I used to have a 454 in it but before I bought it a guy pulled it out and put in a 305 for some reason. Any help would be appreciated.
Even though you had the big block, everything's switched over now to accommodate a small block - I'd stick with the sbc if I were you.
With the selection of modern small block power you have, its about the same price to put in an LS series engine as it would be to source and install a big block of equivalent power. I don't know about the accessories making the switch over, though.
You could save a little money off of both ideas and drop in a first gen 383 (stroked 350), which will give you a good dose of torque-infested horsepower, allow you to mate directly to the trans you have without the LS-required adapters and allow you to retain the exact same accessories and brackets as you have now.
Have you tried to make any changes to that 305? You should be able to coax about 270 hp out of it with well placed mods as well. That year 305 has miserable heads, a very tame camshaft and a very restrictive exhaust - all fairly easy to remedy. Just a thought.
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