Budget rebuild from LT1-350 into LT1-383
Forged Eagle Crank, Callies Compstar Rods, Mahle Pistons
Fresh off the truck.
I'm taking photos for the future. This helps me remember
where things go.
Unusual head bolt replacement. No matter...I'll be
installing new ARP head bolts.
#1 exhaust pushrod was bent. All others good. Engine
Interesting hub sleeve. This one did not install well.
Iron heads will not be re-used. There are a nice set of
LE2 heads waiting to be installed.
Here is the block all fresh and clean and bored to 4.030"
This was machined by Johnny Heard at Heard Precision Machine
The crankshaft was polished and balanced to 1661g
(neutral). More about that shortly......
Using King XP main bearings, (ultra premium).
Most all the caps needed X oversize bearings to help me get
.0020" or more clearance.
Thrust is .004"
Pandora is on the Steve Cropper channel.
Crankshaft is installed so that I can mock up the rotating
assembly to mark the block for clearance.
Here is a big oops. I did not notice that the rods I
selected for this project are 2.00" rod journal. This makes my
balance a bit off. Luckily I still had one set of 2.100"
rods on the shelf. I still need to get a new crankshaft
For now I'll continue to mark the spots that I need to clear
with a grinder.
Click on the YouTube video
link to the left.
More work on the "budget" 383. I like to get the rear of the
engine buttoned up sooner than later. The engine stand prevents access to
the rear and so I put the engine on a table.
Cam plug, oil galley plugs and rear main seal housing
installed. The rear main seal is also installed but not
Look at these heads! Excellent work by Lloyd Elliott. These are
I get 57cc but I think I dripped 0.5cc so it is 56 to 57cc. That is
what Carlos and I marked down as the expected combustion chamber volume.
That gives us 10.8 to 1 static compression ratio. 56cc head - 5.6cc gasket
- 0.013" piston in the hole - (-16ccc piston).
Mr. Gasket #5716G is .026" thick and 5.6cc. Piston is .013"
in the hole and so that gives .039" piston to head clearance.
Premium head bolts. These are ARP 134-3703. I put
oil under the head of the stainless outer bolts and high pressure
grease under the head of the other bolts.
70 ft-lb head bolt torque.
All parts in hand. The lifters are the BowTie GM #188958689. The
guide plates are what I've found to align the rockers best on the LT1 (Manley
TFS pushrods: 7.250"
Not a perfect alignment but almost perfect. Trust me this is better
than the others.