anyone know what size clutch came in an 85 1/2 ton 4x4 truck with the 305??

also im swaping in a 350 here in the next week and i wanna know if my fly wheel and clutch off the 305 will dolt up to the 350 cuz the 350 was in an auto 4x4

More than likely an 11 inch clutch. Flywheels will interchange.

Uhhhm, I think the balancing is off slightly between the 305 and 350. May get a small vibration. Dpends on the years between the blocks also. 1 piece and 2 piece rear seal

and on a standard the crank has a little bushing thing that the point of the trans goes into as a guide. my 85 k20 with a 350 had a 12" clutch

clutch should be an 11" version, 10 or 26 spline. Flywheels are the same for all chevy engines axcept the small block 400 and big block 454. If the 350 came from in front of an automatic it will most likely need a pilot bushing installed in the back of the crank.

what is needed to put the pilot bushing in? and does anyone know where i can get a good clutch for it? i dont want to go with a stock one thats for sure haha..

Install the pilot bushing with an appropriate socket and a hammer.

try summitracing.com, they have a prety good selection. You can narrow it down to find the application your looking for. It should be 1.125", 10 spline input and 11" diameter clutch. I bought a centerforceII clutch for my 400hp camaro and it works great, more grip and a lighter pedal than stock!!

where can i get a pilot bushing?