The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 55.2-59 Advice needed pls. Setting engine/trans

**mr48chev** · 05-03-2022, 12:58 PM

In truth the 55-1/2 though 59 frames have a lot more room in the engine area than the 48/55.1 or the 60/87 frames do.

The six cylinder radiator placement lets you mount the V8 just enough ahead of the stock V8 location when you are running an automatic so you can have clearance without mods.

One thought is that if you are running the stock rear axle and drive shaft swap yokes to fit the transmission and set your engine and trans in to get that fit correct and go from there. That would save the hassle and expense of getting a new driveshaft.

This chart compares most GM automatics that a Chevy/GMC pickup builder might use and should help a bunch. http://www.crateenginedepot.com/pdfs...Dimensions.pdf

While I was at it I found these charts. This one for guys running a GM overdrive trans

This one is a ball park measurement comparison that gives a quick idea of the differences in length and size. It's been around for years

05-03-2022, 12:58 PM	#11
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,817	Re: Advice needed pls. Setting engine/trans In truth the 55-1/2 though 59 frames have a lot more room in the engine area than the 48/55.1 or the 60/87 frames do. The six cylinder radiator placement lets you mount the V8 just enough ahead of the stock V8 location when you are running an automatic so you can have clearance without mods. One thought is that if you are running the stock rear axle and drive shaft swap yokes to fit the transmission and set your engine and trans in to get that fit correct and go from there. That would save the hassle and expense of getting a new driveshaft. This chart compares most GM automatics that a Chevy/GMC pickup builder might use and should help a bunch. http://www.crateenginedepot.com/pdfs...Dimensions.pdf While I was at it I found these charts. This one for guys running a GM overdrive trans This one is a ball park measurement comparison that gives a quick idea of the differences in length and size. It's been around for years __________________ 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.