ok now these guys giving this info dont do there homework go to a celica forum and read yes you can put the 4agze pistons on ure 7a block however you cannot use 4a rods you will have to use your 7a rods but i would recomend getting some forged rods especially when your going to do high boost apps PAUTER makes them also may want to look into getting a thicker head gasket .... as far as a manifold goes if your not doing the turbo set up you will have to get a special exhaust mani cause the ge manifold doesnt clear the oil pan or do the flange on your 7a manifold yes this is all possiable gze pistons do work in ure block the rods dont they are too short look up 6gc.net all the info is there dont trust tampa racing