Best E58 360HP Camshaft....your guesses

Here all these years I thought that the eh1 in the little red express was a modified version of the e58. Not the same engine. Why would you have the same Engine with two different names?

I also thought that the little red express had a larger thermoquad on it , than the E58 came with .
.
78 and 79 engine code is EH1 not E58.

Li'l Red Truck Pkg. (YH6)
Equipment
Sales Code
1978 Code Description
Sales Code
1979 Code Description

Bright front bumper MD2 Chrome bumper, MD2 Chrome bumper
Bright rear bumper MD3 Chrome bumper, MD3 Chrome bumper
Exterior paint color
PY3442 Bright Canyon Red,
PY3450 Medium Canyon Red
G.V.W. YW4 6100 pounds YW4 6050 pounds
360 cubic inch 4BBL V8 EH1 High Performance EH1 High Performance
Automatic transmission (required) FA3 A-727
Loadflight FA0 A-727
Loadflight
Oil Gauage LB2 Electric Analog, LB2 Electric Analog
Rear Axle
AV2 3.55:1,
AV2 3.55:1
Steering wheel
LF4 Tuff Wheel,
LF6 Four Spoke
Western
Chrome five-slot disc road wheels RA3
RA6 Front 15"x7"
Rear 15"x8" RA6 (5) 15"x8"
GOOD YEAR
Raised white outline letter radial tires WMG F
WMH R
Front GR60x15
Rear LR60x15
None WMH (5) LR60x15
Also included as standard equipment on the Li'l Red Truck.
Dual exhaust with vertical stack-pipes, chrome exhaust tips and stainless heat shields. Chrome plated valve covers, Chrome-plated air-cleaner cover, Chrome-plated side bed steps, Utiline body side and tailgate oak body trim panels with chrome-headed prop nuts, Gold 3M pinstriping tape decals on tailgate and doors.




Prototype versus - production EH-1 Specification
EH-1, Engine Component
A / Block "Prototype Specification"
A / Block "Production Specification"

Carburation Holley 4160 series,
4bbl 850-CFM ThermoQuad 4bbl
Intake Manifold Holley Aluminum Hi-Rise, Factory Spread boar Hi-Rise
Cylinder Heads W-2 Hi-Performance,
E-58 Production
Air Induction Dual snorkel fresh air sys. Dual snorkel fresh air sys.
Camshaft Duration 252 degrees w/
Overlap 33 degrees,
Duration 252 degrees w/
Overlap 33 degrees
Oil Pan 5qt. w/windage tray 5qt. Standard
Exhaust Dual 2 1/2" Dual 2 1/2"
Mufflers 2 A134-440 Wedge 2 A134-440 Wedge
Compression Ratio 8.2:1,
8.2:1
Horsepower 230 net @ 3800 RPM,
225 net @ 3800 RPM
Torque 295 lb/ft @ 3200 RPM,
295 lb/ft @ 3200 RPM
1/4 Mile Performance 14.70 seconds @ 93 MPH 15.71 seconds @ 88 MPH
Gas Mileage 13.0 MPG,
13.1 MPG