Trying to solve engine not cooling down

[blown motor]

@jimynick  I did buy a replacement cap and it was no better. I think I'm going for a new rad as the current one is seemingly too small for my engine. That according to local old pro and the Champion website.

[Strawdawg]

and if it does not seal tightly and allow pressure to build, it is going to blow the coolant out...

[dodj]

I have a 26" 3 row Champion Aluminium. Been sufficient for my 440. BUT, If stock appearing is important to you, buy something else.

[blown motor]

@dodj  That's what I was thinking of going with. I have no fender tag or build sheet and the top end of the engine is all Edelbrock so stock looking isn't a priority. Are you also using a high volume water pump?