well its done and we start her up and 15 mins goes bye and over heating like crazy so the striper down and find that the block is craked what a bummer so in need of a short block any one out there got one layin around they want to give to a poor marine

 

289 heads give you 1 full point of compression over 302 heads due to the smaller combustion chamber.....should run great but you will have to run at least 93 Octane all the time.

 

looks like a holley 650 dual feed double pump like I used on my 83 302 motor when I converted to a 4v.How do you know they are 289 heads? I saw no numbers. Could be 260 heads(serious compression ).

 

we broke the otor down to find out they were 289 heads but had alot of stress cracks so lots of time and work went to putting everything through a machine shop now just going to build a new 302 w/ what parts i can use of the old block

 

sounds sort of like a can of worms. Sometimes its jsut better to scrap everything adn start over.