1970 Chevelle SS LS6 454 Project Car

Image Diary Part One -

Parts For Our 454 BBC Engine

Part One) Allstate Transmission's 1970 SS Chevelle project car gets all the parts needed to assemble the BBC engine; what's left of the LS6 starts to look like it might make some decent power, we'd planned for about 800HP.

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Part One includes images of;

The engine, a $200 junkyard LS6 454 4 bolt block needed .125 over bore to get rid of some damage by rusted in pistons, about as far as you can safely go on a stock block.
The crankshaft is a stock length 454 4 inch stroke 4340 forged steel Scat crankshaft and the rods are stock length as well, 6.135 inch H beam Scat rods.
The Ross 4.375 bore forged pistons along with the open chamber heads get us to just over a 14:1 compression ratio and brings the 454 to around 481 ci.
ARP head studs, main studs and rocker studs are the only way to hold our engine together with the performance numbers we're looking to make.
A Milodon oil pan with their Diamond Stripper windage tray and the always reliable M77HV Melling high volume oil pump take care of our engine's oiling system.
Dart Pro 1 aluminum heads will help us move some air through the big block. Flow numbers are great out of the box, but a little porting was needed to make our parts combo work.
Comp Cams lifters and some good size lobes on our .742 lift Mechanical Roller. Their timing chain set is super reliable without breaking the bank.
To help protect the engine and stabilize the top end, a billet Dart stud girdle covers up the Comp Cams stainless rocker arms and the 9.25 intake and 8.28 exhaust, one piece pushrods.
A port matched and cleaned up Dart square port intake manifold with a Barry Grant King Demon top off our big block Chevy for now. We're looking at EFI down the road.
For the harmonic balancer, we went with an externally balanced Fluidampr fluid filled vibration damper, a very nice quality part for the money.
Ignition is from MSD and includes a crank trigger with a 7AL-3 box activating a Pro Power coil. Spark is distributed through a low profile billet distributor wit a crab style cap.
A shot of the Lemons Headers before getting coated. They're long tube bolt together headers that use 2.25 inch primaries flowing into 4 inch collectors.