fiano

hello all i just brought this 5.3 gen 3 and it going in my 1978 c10 pickup im trying to workout what i need to run my built 700r4 , spacer, if needed?? redrlling the flex plate?? etc etc im finding this part very confusing
if i can work out this part i would love to drop the engine in in the next week or 2 also im going to use a later model 700 r4 trans crossmember (out of a 87 c10) and any ideas on headers too!!!
PS does anyone know if the flexplate is dished or flat i really dont have anything to compare it too??

jhubbs

iTrader: (9)

The flexplate should be dished. With my th350 the holes for the torque converter bolts were close enough to just enlarge the holes a little. You'll need a spacer, either the GM one which bolts to the crank or the TCI one which just slips in. If you use the GM spacer put the flexplate on first, then the spacer. The GM spacer is part #12563532. You'll also need longer flexplate to crank bolts which are part #12563533. You'll need six of those bolts. Hope that helps.

orange88ls1s-dime

wat year is the engine if it is pre 2002 the flexplate will bolt right up
as for headers aside from having me build you a custom set which im in the middle of a set right now for an 85 C10 with 5.3L doug thorley is offering a set of convo headers
if your interested in my headers email me ill just build two sets while im building the one for this swap in my shop could be sent out in a few weeks
beaudaciousfab@hotmail.com

supreme84

from what I can see on your pics, your flexplate is dished

fiano

yes its a 2000 tahoe engine the i see it dished where it bolts to the engine is this correct or is the dish really noticable ??
thanks!!

slowfox

I have the GM spacer I am gonna install on mine. Was you converter the small or big bolt pattern on the flywheel?

Thanks
Eric

fasteddy51

iTrader: (1)

I just did post some pics on the flexplate that I used for my 5.3 with 700-R4 transmission. I used a 2001 6.0 flat truck flexplate that had the .4" GM spacer already spot welded to it. I got it on Ebay for $55. I had to elongate the holes on my flexplate about 3/16" to use my stock 700-R4 converter. I know some guys use the stock flat 5.3 flexplate with the # 12563532 GM spacer and longer bolts, GM#125453332 now new # 11569956. If you have the dished flexplate all you need is a spacer that will make up for the .4" difference of the nose of your 700-R4 converter. There is a Summit / Hughes spacer meant to support the center nose shaft of the torque converter. It is part # HUP-HP3795 available at Summit Racing. They are around $45 I think.

Shon Herron

iTrader: (25)

I had several of these spacers made from some local 4x4 guys putting the 5.3s in jeeps, I will let them go for $35.

fiano

ok guys i know this seam silly but i wanna post and make sure i order the right stuff for the engine to 700r4 here are some more pic notice where i have a tape measure the distance from the face of the flexplate to the engine block mounting surface is 7/8 IN
IN THE PIC IT SHOW A LITTLE DISH is this considered a dished flexplate
if so the i need part # HUP-HP3795 from summit
if its the flat flexplate i need part number 12563532 GM spacer and longer bolts, GM#125453332 correct!!!
oh and i need to file the flex plate about 1/8 IN INWARDS on each hole!

Andy1

Can someone clarify this for me: The ring gear ends up in the same position relative to the bellhousing mounting surface on the block whether you have the flat flexplate with spacer, or the dished flexplate. Am I correct?

Thanks,
Andy1