Holding my SM465 in 3rd gear, am I about to blow it up?

[dccarpenter]

Ok,

So I converted my '84 c30 from a turbo400 to an sm465, it is in and running well except has the typical 3rd gear shift pop-out. I, like a fool, believed the guy I got it from when he said it was running perfectly and didn't rebuild it or even open it aside from flushing and refilling it before putting it in my truck. Now it's in there and pops out of 3rd gear, I know I need to replace the shift forks (and possibly another part or two on ). I need it to get around town for the next 2 or 3 weeks, it will stay in 3rd gear if I hold it in place, can I get away with this for that amount of time or am I likely to grenade this thing doing so and hence should I just let it lug in 4th gear? To clarify the driving is a 6mile ride to work and back, maybe a few parts runs, would be in 3rd maybe 5 times for 10-20 seconds.

Blazer's out of commission at the moment and the bus doesn't take me everywhere I need to go so not driving it isn't optional unfortunately.


Any help is greatly appreciated.