[rfmaster]

Originally Posted by Igorsgonemadd

Ok, the motor is an 87 tbi 454 all stock with the exception of an rv cam. I still need to figure out the timing, however. I did figure the overheating out though. It was the clutch fan. It was fine when I parked the truck two months ago to fix the motor and it showed no sighns of being bad. No play in it, cold it would only spin about 3/4 of a turn, nice and smooth no noise. But it didn't seem to be putting out the air it should. As soon as the new one kicked on I knew that was it. It was like a jet engine compared to a box fan. But please someone out ther tell me what my base timing should be for it. Thanks!
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Clutch fans - love hate relationship...
Based on limited information....
Assuming the that your ECM has the following calibration installed

BCC: ACLP
87 R-V Truck 7.4TBI 3speed auto with 3.21 or 3.73 gears
Initial SA: 4.0 deg

BCC: ACLX
87 R-V Truck 7.4TBI 3speed auto with 4.10 or 4.56 gears
Initial SA: 4.0 deg

4 to 6 deg should be just fine for your BBC with RV cam -> which cam did you go with?
//RF