David,
Block 3855961 = 65-66 passenger car and 66 Chevelle 396 325hp in passenger and 325 and 360 in chevelle two bolt main. With the IN code I would guess you have a 66 396 325 hp from a full size passenger car.

Heads 3856206 = Passenger car 396 325 hp closed chamber 97.167 cc 2.06intake/1.72exhaust oval port heads

trooper

[EMAIL PROTECTED] wrote:
Hey Mr. John,

     Some other numbers on the block and heads are as follows
Block= 3855961
Heads=3856206

                                             Thanks

                                              David


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