Author Topic: 289 / 302 block casting  (Read 712 times)

Offline cobraboy

  • Full Member
  • ***
  • Posts: 182
289 / 302 block casting
« on: October 31, 2017, 04:37:35 PM »
Hi Guys
Some questions regarding 289 and 302 blocks.

Am I right in assuming that all 289 blocks had a well or depression on the top surface behind the intake ?

I know that during the changeover from 289 to 302 some 302 blocks were built up as 289's but did these blocks have a flat area behind the intake ?

In other words is it safe to say that all blocks with a well are 289 and all blocks with a flat area are 302 blocks ( even if some were actually built as 289 engines )

Did any 289 engine across any application have an engine number in the area above ?

Thank you.

Mark
13th April 1965 Dearborn K GT on the other side of the pond.

Offline krelboyne

  • Hero Member
  • *****
  • Posts: 695
    • West Coast Classic Cougars
Re: 289 / 302 block casting
« Reply #1 on: October 31, 2017, 04:58:06 PM »
I thought that the blocks with the flat area behind the intakes were 1968 blocks, and have C8... casting numbers. Flat area for accepting the VIN stamp.
Scott Behncke - Carcheaologist
West Coast Classic Cougars
503-463-1130
1968 GT/CS 302-4V San Jose 05B
1968 Cougar XR7 Dearborn 09A

Offline cobraboy

  • Full Member
  • ***
  • Posts: 182
Re: 289 / 302 block casting
« Reply #2 on: October 31, 2017, 06:24:57 PM »
Thanks
So C8 would make all the flat area blocks 302 then ?
13th April 1965 Dearborn K GT on the other side of the pond.

Offline cobraboy

  • Full Member
  • ***
  • Posts: 182
Re: 289 / 302 block casting
« Reply #3 on: November 03, 2017, 04:52:53 AM »
Can anyone nail this down ?
13th April 1965 Dearborn K GT on the other side of the pond.

Offline ruppstang

  • Hero Member
  • *****
  • Posts: 2300
Re: 289 / 302 block casting
« Reply #4 on: November 03, 2017, 09:19:08 AM »
I had all ways thought the ones that had the flat area for the VIN were 302's but I think there was a thread here that some posted a picture of a block with the flat boss that was a 289. Since the then I found one too. I think the vast majority of them are 302's.

Online caspian65

  • Charles Turner
  • Administrator
  • Hero Member
  • *****
  • Posts: 6036
Re: 289 / 302 block casting
« Reply #5 on: November 03, 2017, 10:53:43 AM »
That's the easiest way to ID a 302... the flat spot behind the intake.
Charles Turner - MCA/SAAC Judge
Concours Mustang Forum Admin

Offline cobraboy

  • Full Member
  • ***
  • Posts: 182
Re: 289 / 302 block casting
« Reply #6 on: November 03, 2017, 12:40:27 PM »
OK guys thank you.
I accept that the majority or the flat area blocks would be 302, apart from the late 289's that used the 302 block, but built as 289 internally.
13th April 1965 Dearborn K GT on the other side of the pond.

Offline ruppstang

  • Hero Member
  • *****
  • Posts: 2300
Re: 289 / 302 block casting
« Reply #7 on: November 03, 2017, 10:07:56 PM »
OK guys thank you.
I accept that the majority or the flat area blocks would be 302, apart from the late 289's that used the 302 block, but built as 289 internally.

What I was saying is that there were some 289 blocks with the flat boss cast in them but the majority were 302.

Offline cobraboy

  • Full Member
  • ***
  • Posts: 182
Re: 289 / 302 block casting
« Reply #8 on: November 04, 2017, 04:48:57 AM »
Ah, ok thank you for the clarification.
13th April 1965 Dearborn K GT on the other side of the pond.

Offline NEFaurora

  • Hero Member
  • *****
  • Posts: 814
Re: 289 / 302 block casting
« Reply #9 on: December 22, 2017, 12:50:46 PM »

Anyone have a pic of this flat area in question???

:o)

Tony K.

Tony Kovar (NEFaurora@aol.com)
1965 Mustang Convertible 200 cid 3spd manual
1966 Mustang Convertible Sprint 200 C4 Auto
2007 Mustang Convertible V6 Auto with "Pony Package".
1966 Mustang Sprint 200 Registry Owner/Moderator
MCA#70001

Offline 67gtasanjose

  • Hero Member
  • *****
  • Posts: 3146
  • "Take the MUSTANG PLEDGE"
Re: 289 / 302 block casting
« Reply #10 on: December 23, 2017, 09:35:37 AM »
Anyone have a pic of this flat area in question???

:o)

Tony K.



Below are some pictures of a July 67 final assembly date 289 engine. No VIN stamp in the flat area. "302" cast in the valley lifter area and C8 cast block with 289 pistons etc. otherwise for internals.

C8 cast blocks or blocks with the flat area behind the intake DO NOT AUTOMATICALLY make them a 302 engine (internally). I imagine that a C8 block with a VIN stamp in the flat area would at least be a 68 model year engine since 67's did not stamp the VIN there (but the flat spot IS INDEED there for those built for 67 model year use)  I cannot vouch for when the FIRST or LAST 289 was built using the C8 block but I do know it was late in 67 production and went well into the 1968 model year production (like several month into production) so there ought to be both earlier & later final dates than the one I picture here. Bob Mannel's book on Small Block Fords discusses this but I imagine there is more that can be learned through discussions such as this.
« Last Edit: December 23, 2017, 09:51:04 AM by 67gtasanjose »
Richard Urch

1967 (11/2/66, S.J.) GTA Luxury Coupe, 289-4V w/Thermactor Emissions, C-4, Int./Ext. Decor +many options

2005 (04/05) GT Premium Convertible, Windveil Blue, Parchment Top w/Med. Parchment interior,  Roush Body Appointments

Offline Andrew@MagMustangs

  • Sr. Member
  • ****
  • Posts: 322
  • MagMustangs: Original Parts for 64 1/2-73 Mustangs
    • MagMustangs
Re: 289 / 302 block casting
« Reply #11 on: December 29, 2017, 02:13:33 PM »
Just pulled the 289 out of a late built 68 C-Code Mustang and has C8 block with flat area behind intake and 302 cast in the valley. Block Dated [8E6] and has -B suffix in casting number. Definitely built by Ford as a 289.
MagMustangs: Vintage Mustang Enthusiasts. We have Original Factory Parts for 1964 1/2-1973 Ford Mustang.   Like Us On Facebook. https://www.facebook.com/MagMustangs   Follow Us on Twitter. @MagMustangs