Why do I see soo many 110 heads for cheap? Is there a problem with these heads. Was thinking of picking up a set for my 103 build.
Let me know all the bad about them.
Looking at a 248 duration cam with a 530 lift.
Am I going to have to get the intake runners for these heads? Are the intake manifolds bigger than my 96 runners. Also thinking of 50mmTB.
If need to know I want a jakyl and hyde engine. Cruise on trips with the very frequent hod rod bar hop.

 

The Moco had a "product enhancement" and let the owners take those heads home.
The guides were occasionally dropping out, and the ACR's would sometimes fail.
The port I.D. is 1.750", and the OE head is 1.640".
Good head once attended to, with port work.
Have witnessed 310 cfm @ 28" here, once ported.
I'd be leaning in the direction, of those being too large, for a 103".
Scott

 

I have not seen the 1.640 port, all I have seen are 1.750.
We redo many here. The heads are abundant as Scott said because they fail in service and seize exhaust valves.
The fix is new bronze magnesium guides and the proper fit with premium seals.
I would not really consider them on the 103. Chamber is 97cc and difficult to get the compression where it needs to be for performance applications, for most the OEM head reworked is a better choice.

 

Don,
The 1.640" port I was refering(typo, should be 1.620") to is the production casting dimension I.D. for a non-110", OE head.
Sorry for the confusion.
Scott