Gen one drives were made until the early 90s. Gen two are same concept just different design. One noticeable feature is where the rams mount on the drive off the bell housing. Gen one is further back versus gen 2 further forward. Check your drive serial number from the crashed drive should be stamped on the upper of the drive. Look that up for your correct gear ratio for the motor. I believe it’s 151 to 1 for a 350 and 305
@@DieselMountain While trim tabs usually provide better stability, their affect of top end speed is neglagable. Hydrofoils on the other hand absolutely affect top end speed. I put a hydrofoil on my first boat and went from a top speed of 40mph down to almost 30mph. while I was able to plain out at lower speeds and have better control I lost a lot of my top end performance. I installed trim tabs on my current boat and it improved my control and performance at slower speeds but did not take away any of my top end speed. Both basically do the same thing but in different ways, the hydrofoil acts like a wing in the water to add stability while trim tabs apply downward force to stabilize the boat. If you have both on your boat they are basically working against each other trying to do the same thing.
