what size transmission fits a 350 chevy 427 small block race engine turnkey motor?

Depends a lot on your bell housing. There are bell housing adapters now that will let you put just about any tranny up against a small block chevy. It also depends on which tranny you want. Are you looking for a manual, or an auto? How many gears, 2,3,4,5,6? What are you intending to do with this engine? What car are you putting it in? You’re going to have to be a lot more specific about you intent for this motor.

is it a 350 or a 427? the 350 is a small block the 427 is a big block and both are quite different from one another. most gm motors will accept the TH series auto transmissions, powerglides, muncie standard transmissions, saginaw standard transmissions, 700r4, 200r4, borgwarners, tremecs, and the list goes on. It really all depends on what kind of power the motor puts out, what you want out of a transmission and if you want a manual or automatic

427 small block?
Any trans will fit with the right bell housing.

i love your question, and the cool thing about chevys is when it comes to the inline 6, 90deg V6, all the small blocks and all the big blocks from 1955 to date the bellhousing bolt set up has stayed the same.

with having a 350based 427cid stroker motor there only a few transmissions i would even think about using, and the 200R4 IS NOT ONE OF THEM.

the old school trans as in the TH350 built right is a good one, and when built right can handle 450hp & 500lbs torq

and the TH400 again built right can take just about anything you can put out, but i would put the lower 1st and 2nd gears in it, the lowered gears cost about $275.00 and most trans shops will put them in for ya for $250.00 to $300.00

if you planing on not running this on the street with that stroker motor the power glide is the trans of choice in 1/4 mile racers

then theres the 700R4 this trans is for the most part the same as a TH350 with 4 gears or a over drive gear, and again built right it can take allmost as much as the TH350, and with having an overdrive in it you can use a bigger rearend and not kill the motor or the gas mileage when cruising.

and then there a the new school transmissions.
4l60 is a 700R4
4l60E but i wouldnt use it
and the 4l80 and this one is a great trans and like the TH400 can take just about anything you put to it.
but in the end will cost you way more to hook up as there some things youll need to do to make this one work right with a none computer controled system.

and you can still use a lock up converter on all listed and if a lock up converter is something you want to use i can tell you how to wire it so you wont need a computer to go in to lockup, but this will only give you lockup in the final gear as in 3rd with the TH350, TH400 and in 4th gear with the 700R4, 4l60, 4l60E and the 4l80.

now with all that said, i posted all that just so you had the info to make your own choice, and with out knowing just want your building this to do, but it sounds like a weekend cruiser and stop light to stop light racer, i would use the TH350 as this wont cost you an arm and a leg to build.
or i would think long and hard about the TH400 with the lowered 1st & 2nd gears put in as this trans is just about bullet proff.

and oops theres one more to think about and thats the T56 auto clutch manual shift 6 speed trans, this trans use’s a computer controled system but theres an add on computer you can get to make this work with out a computer controled engine, but it will cost you big to use this one, but again this is one bad trans and can take just bout anything you can put to it.

and for the guys that done seem to know, go to summitracing.com and look at motown small blocks, you can get all the way up to a 454cid in a small block, its called a stroker 350 motor!!!!
heres the site
http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_758094_-1_10763

and hey bud if you need any other info or help just e-mail me…

have a 1992 chevy with 4.3 try to convert it to a 350small block will i need to change the transmission a why