Cascade Crew

RSFreak · Posted: Mon Sep 22, 2008 5:54 am Post subject: All small blocks look the same...

Hey, remember that 350 I picked up for $300 a few weeks ago? Well, TJ and I ran the casting numbers and found out that its actually a 307!!! Shocked

Worst f'ing small block ever! I am hella pissed! But on a positive note, we discovered that the 350 that was in the T/A is a four bolt main block and should be usable after re-honing. So thats the new plan. Now I need some good heads... Wink

Alphius · Posted: Mon Sep 22, 2008 6:13 am Post subject:

Ouch!

Those blocks are the low nickel soft metal ones right?

Wear out easy? Not to mention the lack of displacement being a major problem Wink

I also seem to remember something about the bore-to-stroke ratio being undesirable for power too...

At least you got a good core to build with still!

Quasi-Traction

blue89 · Posted: Mon Sep 22, 2008 11:47 am Post subject:

How could the 327 be better than a 350 with the same heads?

turbo_jimi

badbob66 · Posted: Mon Sep 22, 2008 2:36 pm Post subject:

I had a 70 chevy pickup, I knew it was not the original motor since it had center bolt valve covers, so I ran the block numbers, found out it was a 305 out of a 89 camaro.
2 years after selling it the guy I sold it to was selling it on craigslist, he put on his add that it had a 350 in it.
I can't tell 1 from the other either.
I'M sure somebody know's all the things to look for to tell them apart.
Bob

RSFreak · Posted: Mon Sep 22, 2008 7:25 pm Post subject:

The 305 heads actually have bigger intake valves despite the 307 having a larger bore. Might just put the 305 heads on it and keep it around for future install into the RS. I've read about people making power with 307s, but its alot of work. Sad

Quasi-Traction · Posted: Tue Sep 23, 2008 5:03 am Post subject:

RSFreak · Posted: Tue Sep 23, 2008 4:03 pm Post subject:

wanarunhard · Posted: Wed Sep 24, 2008 10:00 pm Post subject: 307

307 made a lotta torque good for low end power i haj one in a chevelle it was a burnout monster pretty good feul economy motor too

chevymad · Posted: Wed Sep 24, 2008 10:32 pm Post subject:

Gotta remember that a couple 305s have made the same power as the L98's as well. The main thing I like about a 327 is its hp per mpg. It seems to create hp more efficiently then the larger motors. As others always say though, more cubes = more ultimate power.

As for the 307, I personally think its a better combo then the 305. It has a larger bore so the valves are less shrouded, yet same cubes. They really got a bad rap because gm never made a performance version of them. All 307s got small valve heads, 2 barrel intakes, yesterdays version of the peanut cam, and single exhaust. So hp was very limited, which had nothing to do with the actual configuration of the short block.

For an economy 5.0 engine, I think a 307 with a set of 416 305heads.. and a small cam like a comp 256/262 or voodoo equivalent, headers, and 4 barrel would outperform a similar 305 setup.

GREG DAVIDSON · Posted: Wed Sep 24, 2008 10:38 pm Post subject:

i've alway thought bout building a 327 for my firebird as kinda a trib to the ol style corvette my moms bf has a 66 stingray with that set up and its a torque monster and fast as hell yea its all fiberglass and ways less but i still think it would be cool to do

RSFreak · Posted: Thu Sep 25, 2008 6:43 am Post subject: Re: 307