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Original Message
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| 390 overbored 060 |
| By Lew - 02/21/2004 11:43:28 AM; IP 65.178.72.84 |
Had my 390 OBed 60. I am now concerned about overheating. The Block has cast # C7MEA and date code 7L1. It also shows 30352 and 29 DIF. The heads appear to be 390's C8AE-H.
On Gene's Automotive Enthusiast site he shows the C7ME-A block as a 428 CID for the years 67 -70. The 390 would have a stock bore of 4.05 and the 428 would be 4.13. It seems that if the same block was used for both engines, a 60OB would be within tolerance of 4.11 for the 390.
Are my assumptions correct? I did notice that Gene lists the same castings for different CID engines. Will the 15/64 drill bit test tell me anything?
Gene's site: (http://pliverman.home.mindspring.com/index2.htm ) |
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