The Ford Barn

dono50 · 07-23-2013, 03:40 PM

I have to replace the 302 engine in my 70 mustang with C4 tranny. Will an 1989 302 engine bolt up to the 70 C4 tranny?

Jay in Mass · 07-23-2013, 04:45 PM

Yes a 289 will fit....As long as it is not the very early 260 type which has 1 less bolt on the bell housing.

Y-Blockhead · 07-23-2013, 06:49 PM

Quote:

Originally Posted by dono50

I have to replace the 302 engine in my 70 mustang with C4 tranny. Will an 1989 302 engine bolt up to the 70 C4 tranny?

Quote:

Originally Posted by Jay in Mass

Yes a 289 will fit....As long as it is not the very early 260 type which has 1 less bolt on the bell housing.

Is you CRAZY...

craig · 07-23-2013, 07:08 PM

yes, it will bolt up. Just remember that the 89 engine has a 50 oz imbalance and the 70 is a 28 oz imbalance. You must use the proper flexplate, you can buy an aftermarket 50 oz flexplate to fit you c4 convertor. If you must change the harmonic balancer, same rules apply and you can buy a 50 oz balancer with the correct offset for your application

JeffB2 · 07-24-2013, 04:16 PM

Sponsored Links (Register now to hide all advertisements)

Your 1989 donor already has the 50 oz balancer but you will need this: http://www.kmjent.com/cart/ford-sfi-...0l-c4-aod.html Because your Mustang uses a front sump oil pan you will need to use it and the oil pump pickup and timing cover and dipstick from your '70 engine and remember to plug the side dipstick hole on the '89 donor.Also if you are going to retain the intake and Carb from the '70 and manual fuel pump you may want to use the early timing chain and eccentric.

07-23-2013, 03:40 PM	#1
dono50 Senior Member Join Date: May 2010 Location: Bradenton,Fl/ Cheshire,Ct Posts: 710	302 engine compatibility question I have to replace the 302 engine in my 70 mustang with C4 tranny. Will an 1989 302 engine bolt up to the 70 C4 tranny?

07-23-2013, 04:45 PM	#2
Jay in Mass Senior Member Join Date: May 2010 Location: Mass. Posts: 379	Re: 302 engine compatibility question Yes a 289 will fit....As long as it is not the very early 260 type which has 1 less bolt on the bell housing.

07-23-2013, 07:08 PM	#4
craig Senior Member Join Date: May 2010 Location: The Inland Empire of Washington State Posts: 368	Re: 302 engine compatibility question yes, it will bolt up. Just remember that the 89 engine has a 50 oz imbalance and the 70 is a 28 oz imbalance. You must use the proper flexplate, you can buy an aftermarket 50 oz flexplate to fit you c4 convertor. If you must change the harmonic balancer, same rules apply and you can buy a 50 oz balancer with the correct offset for your application

07-24-2013, 04:16 PM	#5
JeffB2 Senior Member Join Date: May 2010 Location: Phoenix,AZ Posts: 1,417	Re: 302 engine compatibility question Sponsored Links (Register now to hide all advertisements) Your 1989 donor already has the 50 oz balancer but you will need this: http://www.kmjent.com/cart/ford-sfi-...0l-c4-aod.html Because your Mustang uses a front sump oil pan you will need to use it and the oil pump pickup and timing cover and dipstick from your '70 engine and remember to plug the side dipstick hole on the '89 donor.Also if you are going to retain the intake and Carb from the '70 and manual fuel pump you may want to use the early timing chain and eccentric.