Last Updated: Apr 2, 2013 added 2 styles of rad caps
Click on thumbnail for larger photo below
For 1970, a new forged-steel crankshaft was used with drop-forged steel connecting rods.
Forged-aluminum 11.0:1 pistons made by TRW. Fitted with a dual snorkle Smog cleaner.
My build date is 05E which decodes as May 5th week.
HP-360 @ 6000 rpm and Torque 380 @ 4500 rpm
Total
timing set @ 36* @ 4000 rpm with vacuum disconnected.
1970 LT1 Cam #3972178
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intake duration of 317 degrees |
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exhaust duration of 346 degrees |
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overlap of 96 degrees |
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Lift - Intake - .4586" (includes lash - .024") |
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Exhaust - .4850" (includes lash - .030") |
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rocker arm ratio of 1.5 to 1)
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Heads
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cast iron |
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2.02 inch diameter intake valves |
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1.60 inch diameter exhaust valves |
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64cc combustion chamber |
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screw-in rocker arm studs with hardened steel pushrod guide plates |
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intake valve 2.02 in. |
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exhaust valve 1.60 in. |
Induction
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cast-aluminum, high-rise, dual plane intake |
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780-cfm 4 barrel carb with1.686 inch diameter primary and secondary throttle bores |
Rad Caps
Without an overflow jug
With an overflow jug. Make sure the arrow points to the tube or the water will not drain back into the rad.
Oil
Oil I use with enough ZDDP to protect the flat tappet engine. I do add 1 bottle of GM EOS with the Valvoline oil.
Joe Gibbs Hot Rod oil does not need EOS. If you add anything it will disturb the chemistry.
I started to use ZDDPlus to non synthetic oil to be better on the pocket book.
GM stopped selling AC PF25 and PF35 oil filters which did not have the anti drain back valve.
Napa Gold 1061 is the replacement for the PF35 oil filter and it also does not have the anti drain back valve.
SB and BB Chevy's already has an anti drain back valve in the oil filter spin on adaptor.
Break in your cam with Joe Gibbs BR Oil
Viscosity typical of SAE 15W-50
Prime Tool
Wiped 3 lobes on the solid lifter cam due to lack of ZDDP after about 43,000 miles. It was a slow wear.
Pic on the right, shows the 1st lifter (2E) good compared to the other 3 concaved lifters.
New Crane Solid Lifters Part # 99250-16
Felpro 1604 Cork/Rubber with Steel Core Valve Cover Gaskets
Valve Cover inside numbers
Fuel Pump Plate
Master Cylinder and Cover
Original MC will have 2 bleeders. Due to leaks I replaced mine with a new one from NAPA.
Wire Gutter 8.25" in Length
Valve Stem O Ring Oil Seal
Compress spring, Grab keeper locks with magnet, Remove spring, Remove old oil valve seal O ring
Install new O ring on stem, then push in groove with wooden coffee stir stick
Stock Pushrod
Using 1.52 Comp Magnum Roller Tip Rockers, part # 1412-16 after my cam swap
What's a CE block?
Underhood insulation was part of the Z87 customer interior option.
Available from Chuck Sharin at http://www.nastyz28.com/forum/index.php
Factory hood insulation clips
Side Cowl Weatherstrip
Balancer
Balancer Fully Installed and timing tab
Pulleys
Crank Pulley
part # 3956668 CG
Water Pump Pulley
part # 3947824BV
Fan Belt
Accelerator Cable
3972296 Accelerator Cable?
1100 mi LA 70 Z28 showing the accelerator cable
Accelerator cable/spring/bracket
336969 Accelerator cable at interior and engine side
To change the cable at the inside rod end,
Laying on the carpet, squeeze the back of the plastic lock and push it towards you and it'll pop out.
There are slits on the back that compress so it can come out of the hole frontward and locks into place
when you push it back on. The plastic piece has a slit in it so the cable can be slid out and the new one
slid back in.
Battery Tray
From GM in 1985
Brake Vacuum Hose
Rad Support Rubber Mounts and hoses
Used for both upper and lower locations. Same part #, 2 upper and 2 lower per car.
Small block part # 371189 Big block part # 6264100
GM Upper rad hose 3970124 and Lower Rad Hose 360647
Gas Cap
Heater hose clamp
Oil dipstick
Washer Jug
Spark Plug Diag
Wiper Motor
