3701887 is a 12953 truck 235 head.

LAQ25I84
L = 1953
A = car 235 equipped with a Powerglide transmission
Q = Tonawanda, NY engine plant
12953-1000 = 11953rd engine out of that plant in 1953

It would have hydraulic lifters.

261s were introduced in 1954 (and, were only used in trucks).