Early 327 engine information gurus?

[special-K]

Originally Posted by Rods

Well i just finished my 67 build and it has the 327 375 with hump heads

I added power steering and all the other bells and whistles

Ive added some pics of how i did mine maybe it will help

I mocked everything up then sent it out to powder coating

Then reinstalled everything

Woo, 375!

Originally Posted by zicc1835

another fan of 327s this one out of a 67 truck

Great to see all the 327 love. All great looking motors. and we know how great they run

[special-K]

A car built around the 327. Game changer!!

The wild beast that was meant to kill the Cobra |...

[Accelo]

All double heads are not Fuel injection heads.
The same double hump castings were used on everything from 327’s 275HP and up. All double hump heads came with either 1.94 or 2.02 valves. Only the lowly 250hp and some others like the 310hp had the small valve heads (1.74). The double hump heads are not rare at all.
The 300hp also had the same casting number and double hump identifications as their 2.02 big brothers. The 300hp has the 1.94 intake valves. Only the 350hp and 365 and 375hp motors came with 2.02 valves.
2.02 heads also had the side of the chamber, nearest to the intake, machined/relived from the combustion chamber from the factory. If you retrofit 2.02 valves to these heads and do not relieve the chambers you actually cut the port flow not increase it. It's mostly old inaccurate lore from long ago lives on never be replaced.
That said I would like to see a 327 with a modern set of Vortec heads installed on it. Would be interesting to see how it would run with some better flowing heads. They would drop the compression slightly as they have 67cc Chambers not the 64cc chambers like the original heads.
If you raced an all-stock 365hp 327 and a stock truck 5.3L in the exact same vehicles the modern truck motor would be faster. The 5.3L makes way more torque. And if you installed an equivalent cam in the truck motor, as the 365/375hp 327 it would be even worse for the 327.
For the record I have a 340hp 327. It is a great motor. But GM has leaned a bit since then.
Cheers.

[mr48chev]

327 engines are cute and worth about 50 Bubba points at small car shows but those heads won't have hardened valves seats in them and aren't going to work well with the gas we have now.

Personally I'd have to think it is rather lame to pull a good strong running engine out a car to stick one in that's only plus is nostalgia rather than practical. Build it for an older rig out of the 50's and spend the money to bring it up to snuff with camel hump heads that have had hard seats put in and a good cam = Bonus.

[A1971Blazer]

Originally Posted by mr48chev

327 engines are cute and worth about 50 Bubba points at small car shows but those heads won't have hardened valves seats in them and aren't going to work well with the gas we have now.

Personally I'd have to think it is rather lame to pull a good strong running engine out a car to stick one in that's only plus is nostalgia rather than practical. Build it for an older rig out of the 50's and spend the money to bring it up to snuff with camel hump heads that have had hard seats put in and a good cam = Bonus.

lame or not.....it's not prudent to put a 16 year old kid in 400 HP truck....
If I wanted to wake it up, I'd cam it, stick a set of Vortec heads and matching aluminum intake...again...not for a 16 year old with little driving experience...