superbee620 Posted April 29, 2019 Report Share Posted April 29, 2019 I’m swapping a l20b into a 1973 620 with L16 . My question is the water pump on the l20 had a clutch fan and would be up against radiator so I put the water pump off the l16 on it non clutch fan which will clear the radiator. But now my fan is hitting my front pulley / balancer . The L20 pulley is 3 grove about 3 or 4 inches long but my L16 pulley is only a 1in or so long which would work if it fits . So can you swap a L16 pulley/balancer onto a L20 or not? I found that the flywheels are different Thanks for the input. Quote Link to comment
john510 Posted April 29, 2019 Report Share Posted April 29, 2019 I believe you can.I must have done it when i swapped an L-20b for an L-16 in my 510.I didn't have the clutch fan setup for the L-20b so just used the L-16 stuff. Quote Link to comment
datzenmike Posted April 29, 2019 Report Share Posted April 29, 2019 The only big difference in the flywheels is the 5 bolt to the crankshaft for the L16/18 and 6 bolt for the L20B. L16 solid pulley will fit but the timing marks may be on the manifold side OR there is a single pointer on the timing cover and 5 or 6 notches on the pulley. The L20B has a single notch on the pulley and a toothed timing scale on the timing cover. What ever you have you can mix and match parts. Quote Link to comment
superbee620 Posted April 30, 2019 Author Report Share Posted April 30, 2019 So should I swap timing tabs with pulleys . The L16 is on drivers side and the L20 is on pass side? Thanks Quote Link to comment
datzenmike Posted April 30, 2019 Report Share Posted April 30, 2019 Yes if different, swap both the pulley and the matching timing pointer. Quote Link to comment
superbee620 Posted April 30, 2019 Author Report Share Posted April 30, 2019 Thanks Datzenmike that will save me money from buying electric fans and fan spacers. much thanks Quote Link to comment
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