47-55.1 Gap Between Running Board and Cab - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Driver_WT · 06-12-2019, 10:53 PM

I have a 53 3100 on an S10 chassis. The running board brackets are custom made by the previous owner. Can someone tell me what the gap between the top of the running board and the bottom of the cab should be (looks like it is about 1" currently).

Also, what how big should the gap be between the front of the running board and the bottom rear portion of the front fender?

Thanks.

Wade

**mr48chev** · 06-13-2019, 12:29 AM

If the gap is straight and even and the boards line up with the bottoms of the fenders right life is good.
Stand back about 30 ft and if everything looks right you are good (help from a rater critical buddy comes into pay here too) If it doesn't look right figure out how to correct it. The running board door sill, bottom of the door and top of the bed rails should all be on the same exact plane. = parallel lines. Nothing looks worse to me than this fad that seems to go with S-10 swaps that has the bed rail drooping down towards the rear in a misguided attempt to make the rear lower and ends up drooping like a diaper full of poo.

Driver_WT · 06-13-2019, 12:36 AM

Thank you MR48Chev. We definitely paid attention to getting top of bed rail, running boards and bottom of cab parallel. Plus we put some rake in the bed rails to match the line of the running boards. Running boards are lined up with the bottom of the front and rear fenders, so sounds like we are good to go.

**jweb** · 06-13-2019, 10:11 AM

I just measured mine and it's 7/8". I'm sure these vary from truck to truck. I think it's more important that they're parallel, plus there's a seal to help hide the gap.

https://www.classicparts.com/1947-54...ctinfo/56-011/

Driver_WT · 06-13-2019, 01:54 PM

Quote:

Originally Posted by jweb

I just measured mine and it's 7/8". I'm sure these vary from truck to truck. I think it's more important that they're parallel, plus there's a seal to help hide the gap.

https://www.classicparts.com/1947-54...ctinfo/56-011/

Thank you. I am still learning about the many seals and gaskets on these trucks.

**mr48chev** · 06-14-2019, 12:52 AM

Cab to running board seals look like this https://www.classicparts.com/1947-54...ctinfo/56-011/

As Jweb said, they are to hid the gap but are one of those minor details that make for a better truck in the end.

06-12-2019, 10:53 PM	#1
Driver_WT Registered User Join Date: Dec 2017 Location: River John, NS Posts: 448	Gap Between Running Board and Cab I have a 53 3100 on an S10 chassis. The running board brackets are custom made by the previous owner. Can someone tell me what the gap between the top of the running board and the bottom of the cab should be (looks like it is about 1" currently). Also, what how big should the gap be between the front of the running board and the bottom rear portion of the front fender? Thanks. Wade __________________ 53 Chevy 3100, SBC 355, 700R4, S10 frame, Ford 8.8 rear with 4.11 gears, front disc & rear drum brakes

06-13-2019, 12:29 AM	#2
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,741	Re: Gap Between Running Board and Cab If the gap is straight and even and the boards line up with the bottoms of the fenders right life is good. Stand back about 30 ft and if everything looks right you are good (help from a rater critical buddy comes into pay here too) If it doesn't look right figure out how to correct it. The running board door sill, bottom of the door and top of the bed rails should all be on the same exact plane. = parallel lines. Nothing looks worse to me than this fad that seems to go with S-10 swaps that has the bed rail drooping down towards the rear in a misguided attempt to make the rear lower and ends up drooping like a diaper full of poo. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

06-13-2019, 12:36 AM	#3
Driver_WT Registered User Join Date: Dec 2017 Location: River John, NS Posts: 448	Re: Gap Between Running Board and Cab Thank you MR48Chev. We definitely paid attention to getting top of bed rail, running boards and bottom of cab parallel. Plus we put some rake in the bed rails to match the line of the running boards. Running boards are lined up with the bottom of the front and rear fenders, so sounds like we are good to go. __________________ 53 Chevy 3100, SBC 355, 700R4, S10 frame, Ford 8.8 rear with 4.11 gears, front disc & rear drum brakes

06-13-2019, 10:11 AM	#4
jweb Senior Member Join Date: Apr 2010 Location: Oregon Posts: 1,224	Re: Gap Between Running Board and Cab I just measured mine and it's 7/8". I'm sure these vary from truck to truck. I think it's more important that they're parallel, plus there's a seal to help hide the gap. https://www.classicparts.com/1947-54...ctinfo/56-011/ __________________ 1951 Truck, LS1/4L60 1964 Suburban, current project 2014 Silverado daily driver 1953 Westerner "canned ham" trailer, rebuilt 1974 Prowler trailer, rebuilt

06-14-2019, 12:52 AM	#6
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,741	Re: Gap Between Running Board and Cab Cab to running board seals look like this https://www.classicparts.com/1947-54...ctinfo/56-011/ As Jweb said, they are to hid the gap but are one of those minor details that make for a better truck in the end. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.



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