[FED 387]

For what its worth the STD engine in the 1983 Z-28 was the LG4 150 HP-- over 67000 sold-----the LU5 175 HP was an Optional Engine in the Z-28 --over 20000 sold---the L69 190HP was also an Optional Engine in the Z-28 they sold over 3200 vehicles-- do not know what NHRA has in THEIR classification guide but that's what GM said they did---FED 387