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Re: 1972 307 cam selection... HELP!
Quote:
Originally Posted by 68Stepbed
The pre-62 283s were small journal, but the 62-68 283s were medium journal, just like the 327s.
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Actually, medium journal cranks were not used in the 327 until 1968. And I think all 283s were small journal. Google it. (For those who aren't sure what we're talking about, I say "medium journal" because only the 400 had what is referred to as "large journals".)
Quote:
Originally Posted by 68Stepbed
The 307 crank was just balanced different for the 307 piston weight. Smaller piston= less weight
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Correct. Several years ago I built a 327 using a 350 block and 307 crank. The shop that balanced it had to add Mallory metal to a few counterweights.
Quote:
Originally Posted by 68Stepbed
The little 302 made impressive horsepower, but torque was limited since it was a high winding road race engine designed to turn 8000rpm (race version at least) on long straights at speed.
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Exactly. A buddy of mine had a late 60s Z28 back in the day, and said it was a rocket ship, but not great as a daily driver. The race versions used dual quads on a cross ram manifold and reportedly made over 500hp(!) on an engine dyno when it was tested by Smokey Yunick.
https://www.jalopyjournal.com/forum/...8#post-6908697
There's another story out there saying Holman-Moody got similar numbers.
__________________
Mike
1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes.
1982 C10 SWB -- sold
1981 C10 Silverado LWB -- sold, but wish I still had it!
1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming.
Retired as a factory automation products salesman.
Worked part-time over the years for an engine builder and a classic car repair shop.
Member here for 23 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!
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