Scotty - 904/sbc Questions?

[Snakeyes_Tx]

I was reading back quite a ways and stumbled across a post you were saying :

"A 904 From an AMC eagle that was used with the 2.5 Iron Duke Chevy 6 cylinder has the correct bolt pattern for sbc, and the tailshaft correct for the NP cases."

Sounds great... but, I'm wondering about this "pilot bushing" and the "oddball torque converter". Which converter does or will it use, to use say, a 350?

Also, is this pilot bushing similar to the thing used to make a 401 bolt to a 727?

Details details details!!!

[scotty]

yers,the older rear wheel drive iron duke 4 cyl uses the sbc bolt pattern. if you aquire an amc eagle 904 that was bolted to the iron duke,you can bolt a small block to it. searches for a torque convertor that would bolt to the sbc flexplate turned up negative.

heres what you do: you use the stock amc eagle 904 convertor. the part that slides into the crank is different,so you will need a pilot bushing to keep it centered,much like for an manual tranny,and prolly just like the 401 to 727. this pilot bushing has to be an outside diameter of 1 and 45/64 inches to fit in the sbc crank,and an inside diameter of 1.337 inches for the pilot on the iron dukes original torque convertor. sorry bout the fraction/decimal measurements,but thats how i found them,and i had a buddy that works at a mchine shop make me one up. am not smart enuff to convert both to decimal,or both to fraction smile.gif

anyway, youmust use the smaller chevy flexplate(153 tooth?bigger one is what- 168?),as the larger one will not fit in the eagle 904 belhousing.now you drill the appropriate holes for the eagle 904 convertor onto the sbc flexplate,tap the bushing into the sbc crank,and bolt it all together. ive still got this tranny takin up space in my basement,and id love to put in somethin to make sure it works,but i dont want a sbc or an auto in my trail jeep. i dont see any reason whay it shouldnt work,tho. the guy at the torque convertor shop said the only thing id have to worry about id vibration if the t/c wasnt centered,thats why you need the pilot bushing. it keeps the t/c happy,so the holes can be alittle bigger,and even alittle sloppy to bolt the t/c to the flex plate,and there should be no worrys. but once its bolted,neither the t/c or the tranny are aware of what engne is in front,and the engine has no idea where his power is going...

you would want to beef it up if the motor in question was makin alot of horsies. you can add a v8 clutch pack,and get a quality rebuild kit with kevlar clutches,etc.

further ques? smile.gif