The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

justcuz · 08-17-2009, 11:27 AM

Yes, 700R4 and turbo 350's had 27 splines. Get the adaptor and crossmember too if you can. Your driveshafts may have to change also. The front one from the Blazer may work, but the back one depends on the output yoke of the 208. You can get 350 tailshafts to adapt to the round 6 bolt pattern if you dont have it already. I am not sure but you may have to measure the tailshaft stick out of the output shaft to make sure they are the same. Measure this at the trans and adaptor. If the adaptors are the same length and you have the same round pattern it should just bolt right up.

08-17-2009, 11:27 AM	#11
justcuz Registered User Join Date: May 2008 Location: Alta Loma, Ca. Posts: 930	Re: Np203 help Yes, 700R4 and turbo 350's had 27 splines. Get the adaptor and crossmember too if you can. Your driveshafts may have to change also. The front one from the Blazer may work, but the back one depends on the output yoke of the 208. You can get 350 tailshafts to adapt to the round 6 bolt pattern if you dont have it already. I am not sure but you may have to measure the tailshaft stick out of the output shaft to make sure they are the same. Measure this at the trans and adaptor. If the adaptors are the same length and you have the same round pattern it should just bolt right up.