ok so i have my 87 rx7, i also have a mildly built 390ci ford big block.

who makes mounts for this.?

what tranny should i use and what driveshaft. anyhelp will be appreciated.

 

help please. im only buying another rx7 if i can use the big block.

 

bump

 

You'll have to fabricate mounts for it, as nothing is on the market. With the size of the 390/427/428 block, there's going to be a LOT of fabbing to get it to clear the steering rack and the hood. Anything can be done given enough time and ingenuity (the mounts themselves shouldn't cost more than $50 in materials to make if you can do the welding yourself...). But it'll take a lot of knowledge of the subsystems to get it to work, especialy steering and suspension.

You can use my old mount plans as a place to start from: http://www.freewebs.com/adesso/mounts.htm

these are for a 5.0 in an FC.

Take measurements of your factory mount locations

 

had to make my own mounts for a ford 3.8 in an fc

not too hard if you know how to and have access to a welder

just be patient and take your time, you only want to do it once!
granny speed shop has the rear diff flanges that you will need and their website has lots of other cool info that you may want to look into as far as wiring and such

 

the ford 390 is one hell of an engine and has lots of torque so be ready to burn the tires or blow up diffs!