difference between these 2 blocks??

[1991vert]

these this one from summit:
http://store.summitracing.com/partd...t=DRT-31384175&autoview=sku&Ntk=KeywordSearch

then there's this one from ADPerformance:
http://www.adperformance.com/index.php?main_page=product_info&cPath=69_82_104&products_id=182


it looks like they're the same block??

the differences i see are:

block material:
cast iron - summit
superior iron alloy - ADperf.

rear main seal:
2-pc - summit
1-pc - ADperf.


im not looking to justify price difference, just if they are the same block....why is one a 2pc main seal and what's the difference between cast iron and superior iron alloy? - which is "stronger"/built better?

i thought they both come from the same manufacturer?

someone please explain....

 

[1991vert]

ttt

 

[1991vert]

no one knows? im sure more people than me have looked into purchasing a dart block...

please help me out

 

[sickboystang]

they are the same block, Superior Alloy Iron just means the composition for the casting material is stronger than say an OEM 5.0 block, and the Dart uses a 1 piece seal. BTW if you are in the market, email me
[email protected]

 

[1991vert]

what's up with summit saying it's a 2pc rear main seal? i thought alloy means it's made up of other metals than just cast iron.

so they are two different blocks or something?

still confused

 

[Lyncher]

yes they are the same block...but im not sure about the seals maybe its a typo? idk