That airfilter is way too small. Get one from a 84 buick lesabre or any 80'S V8 GM car with a large air box. It should fit over the distributor if that is a HEI. It took me a bit of looking but I used the stock air box bottom from the lesabre as stated but had to find a GM lid that was low profile enough to sit under the hood. The top ended up coming from a 77 Corvette but I have seen them on other vehicles. The engine builder at the racing shop I used to work at explained why the bigger air box was better but I forgot exactly what he said. My truck used to lurch a few times and stall in the middle of the road when it got hot. Switched airboxes to the larger one and haven't had a problem since. :smart: Trust me you will be happier.