jwbert

Does anyone have the specs on the 487 heads? Chamber size, valve sizes, flow rate, etc. Thanks :cheers:

mbeeman350

I have a 72 w/350 base engine with 487X heads. Everything I have read and been told (I have not had the heads off of mine to confirm), the chamber size is 76 cc. The intake valve sizing is 1.92 for the base engine the 2.02 for the LT-1 engine. These heads were used in various SB Chevy's for the 72-73 production years. Actually a good piece of equipment for the time! Flow rates and runner size I have never found. Good Luck and :cheers:
Mark :chevy

jwbert

Think I found my answer in faq. 75cc chambers, 161/65cc port volumns. Valve sizes as specified above. Thanks

mbeeman350

Where did you find that info??? I would to check it out too!!!
thanks
Mark :cheers: