Quote:
Originally Posted by 88 coupe
Wait until you see its "stance" before you waste your money.
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I'll second that. I've done a number of big-block-in-place-of-small-block swaps and never had to swap springs. In fact, I usually end up cutting a coil off the fronts to lower the front end even more. If you want a good indication of how the car will sit after the swap, sit on the front fender and see if the stance is acceptable.
Note to Norm: While your ~20 lb number is probably correct for a 60s vintage BBO and SBO, the thinwall, windowed 307 is probably somewhat lighter. I have bare 455 and windowed 403 blocks in the shop right now. My precision Wal-Mart bathroom scale (built with only the finest Chinese steel and lead paint) says the 403 is 170 lbs and the 455 is 200 lbs. I'm guessing that the 307 is a little lighter still. Factor in the lighter crank, shorter rods, and smaller pistons, and the difference is more than 20 lbs. Having said that, your original point about waiting is correct.