i have a number on the pistons of my 390 they r l2245 pistons i have looked for them but cant find anything for 390 l2245 pistons

 

Those are pistons out of your motor? Are they going back in?

Any other markings? Flat, dome or dish? Compression height?

 

yes those are in my motor no other marking beside std. i plan on leaving them in. unless i decide otherwise. believe they r 2 relief dish pistons. dont know compression tho

 

Pictures??

I just picked up a 390 and am looking forward to getting inside and seeing how different it is from my '67....

 

L2245 comes up as a 428 piston. Check that bore!!!

332-428 Ford FE Engine Forum: TRW L 2245 Forged Pistons

https://www.ford-trucks.com/forums/1...e-pistons.html

https://www.ford-trucks.com/forums/2...endations.html

4.13 vs 4.05 bore. A little over 4 or a little over 4 1/8th via the tape measure method....

 

came out to be 4.111 bore give or take 2

 

sounds like you won the 428 lotto .. SCORE!!!!

 

Dude you're lucky.

 

you have a 390 bored .060 over, 428 std bore is 4.135. I've seen so much false info about the 390 that it's mind boggling. The only way to tell what you have is to dismantle it and check numbers. most of the tags that were attached to the original carb stud have been lost & thrown away. no exceptions.