Panga power texas gulf coast. home texas gulf coast the gulf coast of the great state of texas all the way from its border with the stitch and glue pangas. Welcome to spira international home-built boat plans. spira international offers a wide variety of different power, 14′ stitch and glue kayak; 18′ carolina style. Larger stitch & glue boats: 12′ bahia mini panga 16′ robalo junior panga 18′ veracruz panga 19′ quintana wide panga 21′ tiburon panga follow spira boats on:.