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-   -   273 Mopar heads, stock or Eddy? (https://classracer.com/classforum/showthread.php?t=86266)

65signet 12-06-2023 04:38 PM
Re: 273 Mopar heads, stock or Eddy?
 
I run the 675 318 heads on my 273, they work good, the 302 heads are prone to cracking.

Rick J 12-16-2023 08:00 AM
Re: 273 Mopar heads, stock or Eddy?
 
Quote:
Originally Posted by 65signet (Post 689757)
I run the 675 318 heads on my 273, they work good, the 302 heads are prone to cracking.
Are the 302 heads hard to find without cracks? Or do they crack after prepped and raced?

GTX JOHN 12-16-2023 11:53 PM
Re: 273 Mopar heads, stock or Eddy?
 
A lot of the 302 I find are cracked between Intake and
Exhaust Seats OR Exhaust seat to Spart Plug hole.

Usually, they do not cause a leak but I am reluctant to
spend a lot of money on them if visually cracked.

I believe they overheated in street use before i found them.

I have never cracked any small block Mopar heads that were in
place on my races cars and were not cracked before that.

Rick J 12-17-2023 07:51 PM
Re: 273 Mopar heads, stock or Eddy?
 
Quote:
Originally Posted by GTX JOHN (Post 690271)
A lot of the 302 I find are cracked between Intake and
Exhaust Seats OR Exhaust seat to Spart Plug hole.

Usually, they do not cause a leak but I am reluctant to
spend a lot of money on them if visually cracked.

I believe they overheated in street use before i found them.

I have never cracked any small block Mopar heads that were in
place on my races cars and were not cracked before that.
Thanks

66formulas 12-20-2023 05:46 PM
Re: 273 Mopar heads, stock or Eddy?
 
Quote:
Originally Posted by Paul Wong (Post 689682)
If you can find the edelbrock heads they would be fine. I have been looking and not seen a set in over 2 years. The bill to make them work might knock you off your chair. I have a set it and nothing even comes close to working.

The iron heads made great power. No need to spend prohibitive money trying to make the aluminum heads work.
What is the catalog number for the Eddy heads. The one listed on nhraracer are big valve heads. Do you have to put smaller seats in the head?

Chipper Chapman 12-22-2023 09:09 AM
Re: 273 Mopar heads, stock or Eddy?
 
Quote:
Originally Posted by 66formulas (Post 690420)
What is the catalog number for the Eddy heads. The one listed on nhraracer are big valve heads. Do you have to put smaller seats in the head?
Yes you have to change seats and the make the runner the same size as OE head you're replacing. Next question becomes how to do that legally!

Paul Wong 12-22-2023 12:43 PM
Re: 273 Mopar heads, stock or Eddy?
 
Quote:
Originally Posted by 66formulas (Post 690420)
What is the catalog number for the Eddy heads. The one listed on nhraracer are big valve heads. Do you have to put smaller seats in the head?
Yes. Get out the wallet. I have a set and the work it takes is not rational. Look at the CC numbers and get to thinking about that for a minute.


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