New engine build for my 67 Chevelle
Thread Starter
TECH Regular
Joined: Aug 2007
Posts: 405
Likes: 42
New engine build for my 67 Chevelle Well it’s finally time to source parts for the new power plant for the Chevelle. My build will be a 427ci LS.
I’ll be using the following parts for the build:
-Dart LS Next standard deck 4.125” bore block
-K1 4” forged stroker crank and K1 forged rods
-Wiseco -2.8 forged pistons
-Brodix BR7 6 bolt heads (71cc chamber)
-ls7 rockers with CHE trunnion upgrade
-arp head studs
-mr gasket 6 bolt .051” compressed head gaskets
- Johnson ST2126LSR short travel hydraulic lifters
-king coated main bearings
-clevite coated rod bearings
-chromoly pushrods
-comp cams double roller
As far as the cam goes I was thinking the Tick ls7 polluter cam or something else if anyone wants to weigh in. I know custom grind would be optimal so I may go that route.
Goal is a super reliable engine that’s 11.23:1 compression (with pistons heads and gaskets)
looking for around 600-650 hp at the flywheel.
the car is a 67 Chevelle, t56 magnum and a Moser 9”. I currently have 3.25 gears but will switch to 3.70s or higher
I’ll be using the following parts for the build:
-Dart LS Next standard deck 4.125” bore block
-K1 4” forged stroker crank and K1 forged rods
-Wiseco -2.8 forged pistons
-Brodix BR7 6 bolt heads (71cc chamber)
-ls7 rockers with CHE trunnion upgrade
-arp head studs
-mr gasket 6 bolt .051” compressed head gaskets
- Johnson ST2126LSR short travel hydraulic lifters
-king coated main bearings
-clevite coated rod bearings
-chromoly pushrods
-comp cams double roller
As far as the cam goes I was thinking the Tick ls7 polluter cam or something else if anyone wants to weigh in. I know custom grind would be optimal so I may go that route.
Goal is a super reliable engine that’s 11.23:1 compression (with pistons heads and gaskets)
looking for around 600-650 hp at the flywheel.
the car is a 67 Chevelle, t56 magnum and a Moser 9”. I currently have 3.25 gears but will switch to 3.70s or higher
Staging Lane
Joined: Sep 2004
Posts: 51
Likes: 4
From: Saskatoon SK
If were dropping the coin on a lsNext block and Brodix heads I would make sure I'd be buying that stuff from someone who could spec the entire valve train never mind the camshaft. A nice ls3 headed 416 would meet your hp requirement.
An aluminum block 416 would make a lot of sense you can use a GM finished ls3 block and get 4.065 forged pistons and not have to pay for machine work. Stock ls3 heads can make 600hp with a very streetable cam and a plastic intake. With a single plane intake, bigger cam and ported heads 650 is very easy. Aftermarket heads like the Brodix are more about stability under boost than NA performance. The FED M311 heads are also very affordable and would be a great alternative to ported stock heads at a low price.
The performance you gain from dropping 120 pounds off the nose aluminum block vs dart iron is huge.
The performance you gain from dropping 120 pounds off the nose aluminum block vs dart iron is huge.
Banned
Joined: Oct 2020
Posts: 1,984
Likes: 682
Not a better base starting point vs the Ls3. 👍 on the build. A extra120lbs on the nose?
Call a neighbor tell him to sit down in the car....You got your savings vs a aluminum block. 🤔 Big bore 4.125 vs Standard from the factory .065 😩
Call a neighbor tell him to sit down in the car....You got your savings vs a aluminum block. 🤔 Big bore 4.125 vs Standard from the factory .065 😩
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