Topic: Mustang II - need help replacing stock 302 with 1986 302

[rstricklin]

I'm replacing the stock 302 in my 1975 mustang with an 1986 302.   We're only replacing the basic engine so we've put on the old carb/manifold, accessories, and exhaust.   We will be using the 75 auto trans also.

What else do I need to consider? 

Thanks for any help!

[Soaring]

Not much else.  Have you already disconnected  all related electronic items you don't need from the 86?   Which carb did you go with? 

[rstricklin]

THanks for the quick reply!   Yes, all the electronics have been removed.   Initially I'm moving over the stock carb that's still on the intake.     This is a 'project on the cheap' so I'm attempting to not purchase anything unless i have to.  Do you see a serious problem using the old carb?

[Soaring]

Not at all, in fact that Motorcraft carb is the toughest and most reliable carb on earth.  I rebuild them, so I know.  Is it a 4V or a 2V intake and carb? 

[rstricklin]

Its a 2V

[Soaring]

Yeah, that 2100 is one good carb. 

[macstang2]

 You will have one heck of a vibration if you don't change the flywheel/flexplate, your original motor is balanced at 28.5ozs the new motor is 50oz. Since you are using the old trans don't bother looking for a used flywheel/flexpate it's an oddball, If I remember right it has 141 teeth on the flexplate and the only place I could find one was at art carr perfomance.

One last suggestion is the cars rear axle if it's stock it is an 8 inch (uses the same parts as a small bearing 9 inch) and it'll have 3.55 gears which is cool, but only one wheel is driven so you'll have to either put in a spool or traction device of your choice. The reason is that you are about to take your traction poor car from 139 stock HP to 225 HP.