Iron duke l4 to turbo 350??

has anyone done it? If so what was needed? I pulled a 4 banger form 78 monza. looking for trans options. thanks

 

The monza you pulled it out of woulda had either a TH350 or TH250 (same externally, weaker guts) as the factory installed automatic. As well as every early S10 with an auto.

 

refresh our memory...what does the back of the engine look like? is it the normal Chevy style that a typical Chevy th350 would fit on?

 

I thought you were looking to go manual.

http://www.jalopyjournal.com/forum/showthread.php?t=231569&highlight=four+banger

 

I think its the narrow pattern. so any 700 as well from a 2.8L would fit. If it is the narrow pattern any ****** of a 2.8L S-10 would work

 

Yea but some family members cant drive stick. so I fiqured either way would work. What year s10's had that style trans?

 

The old Duke was before the narrow bell. It is stanard Chev bell. If you want a S-10 trans get one from a 4.3 engined truck.

 

Chevrolet bellhousing pattern. Everything works.

 

2.5 ,4.3 and SBC all same bell housing bolt pattern my sons done a lot of swapping around in S10s.I'm only talking about GM (Chevy )4s I understand the later 90s era S10s had Japanese 4s

 

Cool ,turbo 350 reverse manual valve body and an 4000 stall that should do the trick. Make the four banger scream.

 

thanks for the clarifications I will put that in the old memory bank

 

the chevy 11 153 has the std chevy bell hsg pattern, a "iron duke" is a 151 and i dont believe its the same pattern as the 153.

 

I think the '78 Monza engine has the "traditional" Chevy V8 pattern as it pre-dates the fwd Iron Duke engines. The Iron Duke was developed as a replacement for the Vega engine, and was first used in rear drive applications. When the front drive X cars came out in 1980, the pattern was narrowed to be adaptable to the front drive transaxle. When the Iron Duke was used once again in rear drive F body and S truck applications in 1982, it retained the narrow "metric" pattern and the rear drive transmission bellhousings changed accordingly.

Bob

 

If what you have isn't a Chevy bolt pattern, then it's a later block. The later one's are orphans with that odd ball (Pontiac ?)bolt pattern. But I've seen adaptors for them somewhere. Speedway maybe? When I was running my 85 S10 I went through 3 ******s, and would have loved to put a th350 in there in it's place. The stock OD automatic simply cycled itself to death.

 

Well I got a turbo 350. I does bolt onto the iron duke block. Now I am in need of some more direction. I have the turbo 350 torque converter and the 4 banger torque converter. the turbo 350 t/c has a larger bolt pattern then the l4 flywheel on the motor. so I tried to slide the l4 torque converter on the turbo 350 and the shaft size is to large to fit into the smaller t/c. what direction should I be going next? different torque converter? differnt flywheel starter? thanks

 

different converter, I would imagine. the converter you have is probably for a th250.

 

when we picked it up i was told the Chevy II banger i have in the garage is sporting a flywheel from a 283 V8. i'm switchin it out though cause i'm running a Monza 5 speed.

 

A regular 350 V8 flexplate will fit the fourbanger. I have a 153 with a V8 'Glide and it all bolted up.

 

Do you have both transmissions? if you do, look at the input shafts, are they the same? If you don't have both of them, my guess is that one is not a TH350 (could be a 200 or a 350C or 250C?)

 

Nope the shafts are NOT the same size. Is there a torque coverter the will fit on the turbo 350 shaft and still have the small flexplate pattern?