As far as bolt-up goes, the 232 and 258 are the same....BUT, I think the 232 intake was offered ONLY as a 1-bbl, whereas the 258 could be had with either a single or 2-bbl carb. I don't think you could even get a 232 with a 2-bbl carb. So if you wanted the extra power, you'd have to get the special 2-bbl 258 intake. Different physically, not just a plate adapter, ya know. And you'd have to get the "set" of intake and exhaust, I believe the exhaust manny's were different between them, but not exactly sure. Best to get the whole deal if you can, much like disc brake setups. :) Jerry in Virginia 8 Gremlins, none running dammit ( 2 needing carbs, I have them now, just need warm weather to install...) __________________________________ Do you Yahoo!? Yahoo! Mail - More reliable, more storage, less spam http://mail.yahoo.com