4500/205 swap questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SunSoaked · 08-09-2017, 10:29 AM

I'm preparing to swap the stock 350/208 setup in my 85 K20 with a 4500/205 setup I have. The only non- OEM parts I'm using is a long 32 spline input shaft and the AA adapter that's 1 5/8 thick. Also, the AA bellhousing and ORD twin sticks.
My question is concerning driveshaft lengths. Has anybody done this setup? I'm assuming I'll have to get a new rear shaft because it will be too short? Since the 205 doesn't have a slip yoke, I assume the driveshaft will need to be replaced with one that has a slip joint built into the shaft itself? I might also mention I'm running D60/14ff axles, if that matters.

08-09-2017, 10:29 AM	#1
SunSoaked Registered User Join Date: Dec 2011 Location: Yuma Arizona Posts: 1,524	4500/205 swap questions I'm preparing to swap the stock 350/208 setup in my 85 K20 with a 4500/205 setup I have. The only non- OEM parts I'm using is a long 32 spline input shaft and the AA adapter that's 1 5/8 thick. Also, the AA bellhousing and ORD twin sticks. My question is concerning driveshaft lengths. Has anybody done this setup? I'm assuming I'll have to get a new rear shaft because it will be too short? Since the 205 doesn't have a slip yoke, I assume the driveshaft will need to be replaced with one that has a slip joint built into the shaft itself? I might also mention I'm running D60/14ff axles, if that matters. Last edited by SunSoaked; 08-09-2017 at 10:30 AM. Reason: Spelling

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