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For those who have asked the question or those who want to know.
The Chev parts book shows that both front cross member engine mount brackets and the engine mounts are the SAME for both Big and Small blocks. So, if you want to replace your 307 with a 502 (or anything in between) just unbolt the mounts (might want to buy new ones) from your 307 and bolt them to your 502 and re-install. The reverse would apply if you wanted to replace your 454 with a 58 283 (Although I don't want to hear about that one from anyone) . End of discussion.
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The Chev parts book shows that both front cross member engine mount brackets and the engine mounts are the SAME for both Big and Small blocks. So, if you want to replace your 307 with a 502 (or anything in between) just unbolt the mounts (might want to buy new ones) from your 307 and bolt them to your 502 and re-install. The reverse would apply if you wanted to replace your 454 with a 58 283 (Although I don't want to hear about that one from anyone) . End of discussion.
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