Two owner flatbed

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arborvitian

Junior Member
Joined
Nov 29, 2024
Posts
10
Reaction score
81
Location
Virginia
First Name
Michael
Truck Year
1974
Truck Model
C30
Engine Size
350
Great looking truck and you can haul just about anything you want
Now all I need to do is wait until I can afford something to haul. I'm pretty thoroughly tapped out after this crazy build. It's nice being done with it. It was all-consuming for the last three months. I've got more I want to do to it, but nothing is a rush. I need to get it lined up, I need to put a curve kit in the dizzy to try to get the mechanical advance up. It's currently only adding 16°, and that could explain my really poor fuel economy. Instead of doing an HEI conversion, I'm going to try a Pertronix II kit I picked up cheap for Black Friday.
 

arborvitian

Junior Member
Joined
Nov 29, 2024
Posts
10
Reaction score
81
Location
Virginia
First Name
Michael
Truck Year
1974
Truck Model
C30
Engine Size
350
Did you figure the gear ratio when you had the cover off?
Nope, I did not think to do that. I did figure the gear ratio from the tire size, and what I'm turning at what speed (2950 @ 70 mph). With the ratios available for a 14-bolt Corporate axle, I figure I have to have 4.10 gears.

Interestingly, the ratios on this Muncie SM465 with 4.10 gears and this size tires match up very closely with my Jeep with 4.56 gears and 35" tires. Up to 4th gear, they are nearly identical. The Jeep has two more gears, and that's why the Jeep is hitting close to 18 mpg, while the old Chevy is stuck at 6.3 or so. I'm working on that. I'm hoping a recurve kit in the dizzy will get me closer to 10.
 

legopnuematic

Licensed Junk Dealer
Supporting Member
Joined
Oct 27, 2016
Posts
2,542
Reaction score
6,633
Location
MO
First Name
Spencer
Truck Year
1971, 1̶9̶7̶4, 1976, 1979,1̶9̶8̶5, 2002
Truck Model
Dart Swinger, Sierra 10, C10 Cheyenne, C10 Big Ten, Silverado 10, Ram 2500
Engine Size
225/6, 350 c.i., 350 c.i., 5.9l Cummins
Welcome from Missouri.
 

Fat 454

Full Access Member
Joined
Jul 24, 2012
Posts
110
Reaction score
187
Location
Australia
First Name
Andy
Truck Year
1973
Truck Model
C20 Suburban
Engine Size
454
welcome and 11 out of 10 for the impressive photo load out on your intro post. Most common call out here is "post pics", however you've covered that in spades.
Great inspiration for the rest of us with the project "still sitting in the barn waiting on parts .. "
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
30,492
Reaction score
28,492
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
Dang, you really know how to make an entrance!

Howdy from Ohio!
 

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