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General Information

Year
1970
Make
Chevrolet
Model
El Camino - Custom
Color
Light Sky Blue Metallic
Packages
Custom, had A/C
History
Built in Van Nuys (Los Angeles), California plant. Purchased in 2014. California car all of its life.

Car painted in 2013.
1970 Chevrolet El Camino - Custom (Light Sky Blue Metallic)

Modifications

Drivetrain
350, cast iron heads, blower spec cam, satin finish B&M - Weiand 144 (long snout) Series Supercharger, about 6 lb boost, Holley mechanical fuel pump, Mark VIII electric fan using single speed controls, and other stuff.
Here is Jeff Smith Mk VIII article:
https://www.hotrod.com/articles/ccrp-1111-electric-radiator-fans/

2nd img shows swaps
1 ) Holley supercharger double pump 750 CFM. A 0-80576S Holley Supercharger carb with boost reference added and larger accelerator pumps. (Replaced Edlebrock 600 CFM)
2 ) Swap MSD StreetFire HEI (was previously other import)
3 ) Finned aluminum old skool valve covers, breathers and wire looms
4 ) Vacuum and fuel lines cleaned up (new plumbing)
5 ) Dress up the engine, VHT titanium ceramic engine paint to come close to car exterior paint color. Paint blower manifold and body silver.
6 ) PowerMaster Gear Reduction mini starter and new B&M SFI flexplate
7 ) Taylor 8MM spark plug wires
8 ) B&M stacked plate transmission cooler
9 ) New larger lines and A/N fittings for trans cooler to improve flow and cooling.

Yes.... I have yet to get the new air cleaner where it can be on carb and fit inside the cowl hood circle.

Because of the blower and my not having a boost timing module to subtract timing as boost is added, the timing is set up differently than most. Too much advance under load can cause detonation. Not a good thing when you add 1 to 6 lbs of boost.
Since I don't yet know what is inside the block, this is a conservative approach to timing to stay out of detonation. This also seems to encourage the engine to produce less heat. The moderately large blower cam in this engine needs a lot more initial base timing to idle nice and not produce heat in the exhaust chambers and headers.

For now we are trying:
Initial – 28*
Centrifugal – 0* Locked Out
Vacuum – 8-11* (MSD Specs)

So that is 28* of total timing (Initial + Centrifugal and does not include vac advance). All in at idle through WOT.

Then the vacuum advance is controlled via the MSD Vac Advance Cam to add more. So we can get to 36-39* when cruising. We use the limited 8-11* setting on the vac cam and can increase/decrease it if we decide to later by changing the position of the vacuum cam selector.

When accelerating hard, it drops out the vac advance and goes back to 28* for WOT as boost is added.
Interior
Orig interior trim was black 755. Looks nice, yet not perfect.
The Strato Bench is probably from a 70 Riviera. It has the 1970 bucket seat backs with a very comfortable bench bottom. The Strato bench seat includes a fold down console with iced tea holders. The seat uses black Sierra, rather than the Chevelle/El Camino black Madrid upholstery.

Dash pad needs replaced (New OPGI dash pad now on hand).
Dash needs cleaning and work on lenses.
Steering column/wheel looks replaced?
Kenwood stereo/cd/mp3 with speakers in kick panels near your feet. May 2018: It appears the windshield does not have built in antennae. Even though hooked up to radio, no radio reception. The CD is now working. However, with huge pipes and FlowMaster 40's, the engine sounds can overpower the CD.

2015 April: Added 3 point retractable seat/shoulder harness for driver and passenger by Seat Belt Solutions.
Exterior
Looks primarily clean and stock except:
Light Sky Blue Metallic (was 45 green mist).
SS hood with black stripes (needed for supercharger clearance).
Some minor chrome emblems removed.
Audio
General Motors Performance Products 350 crate engine plus some goodies.
B&M TH700R4 4 speed overdrive trans with aluminum pan.
B & M Hammer Ratchet floor shift.
10 bolt 3.08 rear end.
Exhaust
Tri-Y 3/4 length headers into huge 3" pipes true dual exhausts, then Flow Master 40s (13 inch)and finally dumps via deer paws just prior to the axles.
Suspension
Seems to ride pretty nice for a 1970.

Power steering and "maybe" a newer faster ratio.

Suspension is stock and old, except shocks had been replaced. Front sway bar installed.

2015 April - Converted from vacuum power brake to hydro boost by http://www.shearperformanceinc.com/
It does have power front disk with rear drums. Braking system much improved when converted to Hydro Boost system.
Chrome Corvette style master cylinder.
See my thread on
Conversion to Hydro Boost Brake System - 1970 El Camino
https://www.elcaminocentral.com/showthread.php?t=152114
Wheel and Tire
Original two piece Boyd Coddington 17 inch Junk Yard Dogs 7" wide in front and 9 " wide in rear. They wear Riken Raptor 225 50R17 front & 255 50ZR17 rear. Tires have a diameter of about 25.9 inches, so that (plus tired orig springs) is why it sits just a little lower than stock.

Gallery

Comments

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32 Posts
Old Bear.....Got to tell you this car is awesome in every way manner and yes form. As my car continues to grow I am going to use this post as a guide. Thank you for sharing this beauty with me.
Russ
 
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