i have a targetmaster 350 casting number 10066036,1m1002, 2vp. with very little mileage that i want to use in another car. did this motor come with a stock timing chain set up and if so would it be a good idea to upgrade it to a double roller. also would i have any problems with the way it runs if a was to drop a dual 4 set up on it without any upgrades to this motor. can anyone decode the casting numbers that are on the front flange on this motor.. 1m1002, 2vp. thanks alot!!!!!