4.3 into 83 yota few questions

mjfrawg · 06-23-2009, 05:48 AM

wats the best headers to use or will stock manifolds work?
wats the min body lift needed , dont want more than 2"?
wat radiator do most use?
ill be fabbing most stuff my self im a certified welder & my profession is in metal fabrication.
its 4.3 chevy with a 700r4 im replacing a 20r w/a 5 speed

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sdstud212001 · 06-23-2009, 07:16 AM

do you mean 3.4?

yodathespian87 · 06-23-2009, 07:23 AM

The 4.3 is the 3UZ Lexus right? Good luck with that one I have been looking for folks builds and haven't had much luck with that. And I heard that if you are keep the IFS in the front you can doa body lift, they say 2" works, or you have to find a front sump oil pan? On lexusextremes and uzswap.com they talk about this a little more in depth.

3UZ-FE- 4.3L, 290-300Hp, 325 ft. lb. ALuminum Block and Heads
Lexus LS 430
Lexus GS 430
Lexus SC 430/Toyota Soarer
Toyota Crown Majesta
Super GT

sdstud212001 · 06-23-2009, 09:41 AM

oh the lexus engine, whoops

yodathespian87 · 06-23-2009, 10:40 AM

Thanks for the edit: I don't know about the Chevy engine Sorry. FillsRunner4 has a chevy engine in his runner I would talk to him he may be able to help you there.

fillsrunner4 · 06-23-2009, 12:12 PM

Advanced adapters has some headers although I hate the design. they neglected to watch for the sensors when making the headers so a little grinding on the header flange may be in order. Kinda dumb of them but oh well. Also a nice header are some Sanderson's (i believe they are called not 100% on that tho). they dump pretty much straight down and are nice and short. Youll have to fab up the remaining.

You dont need a body lift or at least Im not using one. Youll need some new motor mount adapters that AA sells also. Or do what I did and make some

Will give you a little leg room to work with if youd like to sit the motor where you want it. Keep in mind you do that and you have to change the tranny crossmember which by the sounds of it your gonna have to anyway.

As for radiators a nice aluminium one will do you good. Im using a GMC box van aluminium radiator and the Mark IV 2spd fan (similar to the ford tarus fan but bigger) The radiator is to wide for the front so its in the bed area of my 4runner. Ide get the motor in and take some measurments and get a radiator that will fit in there and a nice fan.

Check out my build threads. the links to them are at the bottom of my sig.

06-23-2009, 07:16 AM	#2 (permalink)
sdstud212001 Registered User Join Date: Feb 2006 Location: Split time between Flagstaff & Kingman AZ Posts: 1,617	do you mean 3.4? __________________ 1987 DLX 4X4 5 Speed: Electric Flex-a-Lite,SR5 guages,Yokohama Geolander A/T+ II,Pro Comp AAL, KC Slimlites, Bull Bar, Aux fuse box, Limo Tint, Marlin Crawler Bumper, painted shell, Sirius Wish List: Safari Rack,Bigger tires, SDORI BJ Spacers, 2001 Limited 4X4 Auto:Tundra 231mm brake upgrade, Brembo Rotors, Akebono Pads, 17" 2007 4Runner wheels, Yokohama Geolander AT-S,Sirius & Limo tint Wish List: TJM Front Bumper, KC Hilites, Safari Roof Rack, Thule Cargo Box, Rock sliders, Limo Tint

06-23-2009, 07:23 AM	#3 (permalink)
yodathespian87 Contributing Member Join Date: Apr 2008 Location: Colorado Springs, Colorado Posts: 468	The 4.3 is the 3UZ Lexus right? Good luck with that one I have been looking for folks builds and haven't had much luck with that. And I heard that if you are keep the IFS in the front you can doa body lift, they say 2" works, or you have to find a front sump oil pan? On lexusextremes and uzswap.com they talk about this a little more in depth. 3UZ-FE- 4.3L, 290-300Hp, 325 ft. lb. ALuminum Block and Heads Lexus LS 430 Lexus GS 430 Lexus SC 430/Toyota Soarer Toyota Crown Majesta Super GT __________________ 86 Pickup 4x2, Manual (Sold) 87 Extra Cab Pickup 4x4, Manual (Sold) 93 4Runner 4x4, Manual, 3.4 Swap In progress 90 4Runner 4x4, Manual, Blown 3.0 (Stripping out for parts then to become a trail rig/camping/fun truck) 94 Lexus SC400, 1UZ, magnaflow exhaust, after market headlights, bought for parts for the swap into the 90 4Runner Last edited by yodathespian87; 06-23-2009 at 07:26 AM.

06-23-2009, 09:41 AM	#4 (permalink)
sdstud212001 Registered User Join Date: Feb 2006 Location: Split time between Flagstaff & Kingman AZ Posts: 1,617	oh the lexus engine, whoops __________________ 1987 DLX 4X4 5 Speed: Electric Flex-a-Lite,SR5 guages,Yokohama Geolander A/T+ II,Pro Comp AAL, KC Slimlites, Bull Bar, Aux fuse box, Limo Tint, Marlin Crawler Bumper, painted shell, Sirius Wish List: Safari Rack,Bigger tires, SDORI BJ Spacers, 2001 Limited 4X4 Auto:Tundra 231mm brake upgrade, Brembo Rotors, Akebono Pads, 17" 2007 4Runner wheels, Yokohama Geolander AT-S,Sirius & Limo tint Wish List: TJM Front Bumper, KC Hilites, Safari Roof Rack, Thule Cargo Box, Rock sliders, Limo Tint

06-23-2009, 10:40 AM	#5 (permalink)
yodathespian87 Contributing Member Join Date: Apr 2008 Location: Colorado Springs, Colorado Posts: 468	Thanks for the edit: I don't know about the Chevy engine Sorry. FillsRunner4 has a chevy engine in his runner I would talk to him he may be able to help you there. __________________ 86 Pickup 4x2, Manual (Sold) 87 Extra Cab Pickup 4x4, Manual (Sold) 93 4Runner 4x4, Manual, 3.4 Swap In progress 90 4Runner 4x4, Manual, Blown 3.0 (Stripping out for parts then to become a trail rig/camping/fun truck) 94 Lexus SC400, 1UZ, magnaflow exhaust, after market headlights, bought for parts for the swap into the 90 4Runner

06-23-2009, 12:12 PM	#6 (permalink)
fillsrunner4 Registered User Join Date: Jun 2004 Location: Sammamish, wa Posts: 2,724	Advanced adapters has some headers although I hate the design. they neglected to watch for the sensors when making the headers so a little grinding on the header flange may be in order. Kinda dumb of them but oh well. Also a nice header are some Sanderson's (i believe they are called not 100% on that tho). they dump pretty much straight down and are nice and short. Youll have to fab up the remaining. You dont need a body lift or at least Im not using one. Youll need some new motor mount adapters that AA sells also. Or do what I did and make some Will give you a little leg room to work with if youd like to sit the motor where you want it. Keep in mind you do that and you have to change the tranny crossmember which by the sounds of it your gonna have to anyway. As for radiators a nice aluminium one will do you good. Im using a GMC box van aluminium radiator and the Mark IV 2spd fan (similar to the ford tarus fan but bigger) The radiator is to wide for the front so its in the bed area of my 4runner. Ide get the motor in and take some measurments and get a radiator that will fit in there and a nice fan. Check out my build threads. the links to them are at the bottom of my sig. __________________ 94' toyota 4runner (Many a change!) purchased bone stock, NOW... SAS, 39" Iroks, Rear Leafswap, 5.29's , Air locked front, Welded rear, Chevy 4.3L V6, 5spd swap, dual T/C's MC10R10, flatbelly with custom skids, sliders, Chopped, Bobbed and so much more. Might as well start reading this if ya want know more Fillsrunner4 3.4crawler Build Thread Fillsrunner4.3 crawler (Part Two) build thread

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