It is difficult to tell for sure. Search results seem to show that there are not any, however perhaps a search through a local paper or car magazine would yield different results.
150
Petrol 307s, pre-December 2006 cars, new cambelts are required every 80,000 miles or 10 years - later models can cover 100,000 miles
There is no fuel filter in the 307s. The fuel pump which is located in the fuel tank and can be accessed by lifting the rear seat acts as a fuel filter, and therefore it is not replaceable, unless you change the fuel pump which regularly lasts for 80.000 klm.
yes, but it is very hard to do.
Oldsmobile used 307s in those days, not 305s - the 307 had 140 hp
Yes you can but it will need to be rebalanced because of the 307s lighter pistons and rods.
in fact u can make a bit over 300 hp and about 325 ft lb. u need heads that will flow better a cam that has good lift and duration a exhaust to help scavange and you will be reving out some serious numbers form that little engine, everyone will tell u to build a 350, but 307s are cheep and respond well to upgrades. and you will be able to cruse with less of a dent in your wallet on fuel cost.