Quote:
Originally Posted by SCOTI
Doesn't make sense to overbore it from the start if it's spec'd like GM's block (4.00x3.48) as cast. That eliminates longevity on an expensive core part.
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yes it leaves less room for a rebuild with .060 being as far as one would want to go. IMHO most, including me, who buy performance motor be it rebuilt or like BPE larger than 350 bore on a SBC will never see the milage (100K+) on these motors
If it is just a stock replacement motor one wants than just buy a new 350 from GMPP. small iron head valve, 350 ci, around 2xxhp vortec head motor. Some do and sell off the heads and stab a cam and put aluminum heads on those motors to get what is considered minimum HP for a fun streetcar now being 400 ish HP
2 of my hobby cars have either a 383 or 357 and at most see 3-5k mi a year so for me I will never see 100k mi on those motors...although I do have 45+k mi on my 383 but it took 17 years to put that much on it. Both run great, no leaks and no oil use. YMMV