Hi all. As part of the ongiong process to improve the looks of my '65 inside and out i want to replace the guages in the dash. As i'm quite new to this i was wondering what size guages will fit into the main tunnels where the speedo is on the left and the temp/fuel is on the right and if any modifying is needed. i want to replace the speedo with a more up to date version and opposite i would like to put a tach. there is a smaller tunnel between these where i think they put a clock in some models and was hoping to put a fuel/temp guage in it's place but am unsure of what size would fit. Any help with this would be much appreciated.

Roger.