2D AVE. SUBWAY PUT OFF FURTHER
NYC Mayor Beame proposes 6-yr transit-construction program providing no further money for 2d Av subway, but emphasizing completion of new Queens trunk lines and modernizing city's existing subway system; plan involves massive use of newly available Fed aid to 'stabilize' transit fare; Beame adm's major shift in transit-spending priorities casts grave doubts on future of 2d Av line; new lines to be completed will provide new trunk connection from Manhattan through 63d St tunnel to Queens and include southeast Queens line to Springfield Gardens; Queens lines known as 63d St route, super-express bypass to Forest Hills, Jamaica Ave elevated replacement, Archer Av sec and Southeast Queens route will be pushed to completion by '81 to '83; NYC Planning Comm Chmn John E Zuccotti outlines plan during closed meeting of Estimate Bd; says 6-yr plan envisions $5.1-billion expenditure in Fed, state and local funds; says $2.3-billion will be allocated for 'stabilizing' fare, $1.35-billion for upgrading system and $1.47-billion for new routes; Bronx Boro Pres Robert Abrams says his boro is being short-changed with decision to delay extension of 2d Av subway (M)