I just got a set of 376450 heads to replace the old worn out heads that were on the car, Yes I know they are small but this is a stock 305 engine and I have no need to get vortek heads for it, I am not going to put good heads on a to small of a motor and I am not out to impress anybody at all, that can get to costly and that engine will be built this winter. But what I cant remember is the temp boss hole size, I got a stock replacment sender and it is to small for the boss. I know there are 2 sizes, I will need the bigger of the 2 can anyone help me with a part number? something like a borg warner number? Thats all the orilleys near me seem to sell.
Thanks.

 

Use the stock sender with a pipe bushing.

 

Like a sleave?

 

Something like that