I was lucky enough to score my coupe which was apparently an auto from factory. Still required a fair amount of "massaging" tog et to fit an an R30 gearbox. But is the R30 gearbox physically bigger or smaller than a CA/SR gearbox?

yes, lots more

cheers mate. using the 120y tunnel is that gonna give me more room than the original trans tunnel in the ute

or if you can find an auto 1200 one...they also work

use a 120y tunnel or stanza if you dont mind bashing it into shape. use the 120y one and save some $$$

i want to put a sr20 in my 1200 ute and have been told the trans tunnel has to be bigger for clearence i have looked at the transmission tunnels that MADDAT are selling that you just weld in. but thats means i have to remove the heater box. any ideas on what i can do to be able to keep the original heater box in?

thanks