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| | | Forums66 Topics128,187 Posts1,057,315 Members48,468 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Nov 2006 Posts: 324 Shop Shark | | Shop Shark Joined: Nov 2006 Posts: 324 | Wondering if anyone could help me out. Trying to get the measurements & space between the top of the boards & the cab bottom to look even. (51 chevy short box) This is the area where the cab to running board rubber will be installed later. Checked out the search feature and both my manuals and there is no reference to explain the distance. The brackets have off and on a lot & the space varies from back to front of cab. The brackets & cab are donor and not original to the truck I started with. Im thinking I will have to perhaps do some shimming. Anybody know these measurements? | | | | | Joined: Mar 2009 Posts: 5 New Guy | | New Guy Joined: Mar 2009 Posts: 5 | I do not know distance from cab to running board but I can give you the distance from top of frame to bottom of floor panel. On the front cab mounts it is 1.83 inches +.06 and on back shackle mounts from floor panel to top of frame is.76 inches +.06. This is coming straight from a factory assembly manual. This should get you in the ball park. | | | | | Joined: Dec 2004 Posts: 425 'Bolter | | 'Bolter Joined: Dec 2004 Posts: 425 | I found out that putting running boards on a total rebuild is no easy task. I had to adjust my new bed, shim the cab, shim the running boards... a lot of adjustments to make the running boards look right. And after two days of loosening things up and trying to get every fraction of an inch I could, I still have to shorten the driver's side splash apron so it will fit. At least that will be the end of the project!
Last edited by oldcarandtrucknut; 04/10/2009 1:20 PM.
| | | | | Joined: Mar 2005 Posts: 1,513 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,513 | Wondering if anyone could help me out. Trying to get the measurements & space between the top of the boards & the cab bottom to look even. (51 chevy short box) This is the area where the cab to running board rubber will be installed later. Checked out the search feature and both my manuals and there is no reference to explain the distance. The brackets have off and on a lot & the space varies from back to front of cab. The brackets & cab are donor and not original to the truck I started with. Im thinking I will have to perhaps do some shimming. Anybody know these measurements? Food for thought: The runningboard is directly mounted to the leading edge of the rear fender with no adjustment in any direction. The splash apron is mounted against the top of the board with a bracket and some pivot movement. The top of the apron should be parallel with the box bottom with at least ¼” gap and the thickness of the blocks/shims and play around the box mounting bolts is going to tell you where the boards are going to be. The measurement you’re after becomes “whatever you end up with” and IMO is the purpose of the rubber skirt under the cab. Curt B
1952 1300 Canadian 1/2 ton restomod You Tube | | | | | Joined: Nov 2006 Posts: 324 Shop Shark | | Shop Shark Joined: Nov 2006 Posts: 324 | Thanks everyone for all the great feedback. Fortunately I discovered that when I mounted my cab, I had added 1/2" to much between the cab and the frame. After removing the extra rubber spacer also lowered the rad bracket to front frame 1/2". Now the side view between top of the running boards and bottom of the cab looks even. I did a dry fit with the new cab to running board rubber seal and it looks to be just about perfect. I'm happy! | | |
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