Help with engine to trans bolt sizes

[Emeraldart]

Just finished installing my 360 and 727 transmission in my 71 Demon.
The top two bolt sizes, left and right of centre are 3/8 coarse, the bottom 4 are 7/16 coarse...what sizes are the ones in between...the bolt hole where the transmission dipstick tube mounts and the opposite one on the other side.
I tried 3/8 they won't fit and 5/16 is too small...it has been a long day on the wrenches I know I am missing something simple..Thanks James

 

[fishy68]

Their 3/8" like the top ones. If they wouldn't go in check to see if there's any gunk in the threads.

 

[70aarcuda]

yes..the 4 bolts the come from the trans into the block are 3/8 ..same as the intake..

the two bolts on the bottom that go from the engine into the trans are 7/16...

run a tap to clean up the threads.

 

[Emeraldart]

Thanks guys for your help...