WELCOME ABOARD. - Have you looked at the 1958 Crestliner information in the FG library?
(The 1957 model is PROBABLY similar AND your boat may NOT even have been built/titled/sold in 1957 anyway.)
It has been my experience that older boats title "information" is MORE often just plain WRONG, than correct. = A gentleman here in The Alamo City has a 15 foot Glastron fiberglass ski-boat that is titled as a 1953 model.
(Glastron, Inc. wasn't even founded until late 1956 and built their first hull for sale in 1957. - The boat in question is really a 1959 Fireflite.)
In another case, a man in Austin has a 19 foot I/O runabout, that is identified on the title as an 1965 ARROWGLASS 17 foot.
It is actually a TWIN RIVERS Citation, carrying a data plate with the correct Twin Rivers brand-name, hull number and the I/O engine & outdrive serial numbers are also correct.
(How the original owner missed the brand-name, hull number & serial numbers of engine/OD on the attached stainless steel plate, when he applied to TPWD, is a puzzle.)
BEST WISHES on your hunt for correct information & the following restoration.
I have looked at all of them and im stuck the guy I got it from had put a plywood floor in it ripped off the windsheild did away with throttle and steering wheel the only thing I found was 710-650h stamped on the boat