Ok, well I am getting towards the end of the motor I am building. (4AGTE)

But, just hit a snag.....

I have got up to the point of fitting up the CAS. I can't get the CAS fully in, because the end of the CAS shaft is hitting the ARP head stud, the ARP studs look like they sit higher than factory head bolts.

See pic:





Here you can see the gap size between the CAS and the head:





Is this a common problem?
Something not compatible?

I got a distributor too, and that fits fine because the shaft is not as long........

Any help appreciated.....

Thanks.