New gm motorsports zz502, 508 hp and 580 ftlbs tq, never been started or ran. Pushrods, rockers studs and rocker arms new upgraded pieces vs stamped non adjustable rockers and weak pushrods. Also has arp head studs vs stock bolts. These motors come w gm motorsports 290cc oval port aluminum heads that out perform the 088 310 cc factory iron rectangle ports. They could be removed and port matched to a factory rect port intake. Harmonic balancer has been changed to a new sfi rated piece. ZZ502 hydraulic roller cam cam has 224/234 @.050 duration 110 LC and .527/.544lift, a 500 efi cam on 114 cl would be a big improvement or run it the way it is, 7000 obo. Comes w original auto flexplate. VASSAR , MI 48768 9892137434

More pictures and it IS a gen 6 block.

If it never ran how do you know exact hp and torque? It is obvious you never ran it. Super clean. Just curious.

Gm has ran them and publishes the hp/tq, those numbers are with a dual plane gm intake and 870 cfm carb fwiw.

yes gm specs are nuts on. whats the price?

7 grand come on i bought 1 5 years ago for 3500.

[QUOTE=freekazoid;4483359]7 grand come on i bought
they are selling around here used out of hotrod car with 2 years on them for 4500 to 5000, glad you got a good deal!

I will also add this, if buyer wants a better cam installed and degreed i will do the labor at no charge. I will also flow and clean your injectors if putting a merc efi on it and do a base tune then retune thru mail if you provide me running o2 data at no charge

Really.

That is a smoking good price.

yup priced to sell. wish the cam was the right LS