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Thu 24 of May, 2018 [10:00 UTC]
->Hot Heads Tech Talk
->57 354 Spit fire convert to hemi?
57 354 Spit fire convert to hemi?
First off I wanna thank all of you for sharing your knowledge with so many so freely !!!
I picked up a 57 4 door Saratoga That isnt in the best of conditions but it will provide needed Templits to build forms/Bucks for Quarter panel repairs I need on my 57 New yorker 2 door so I am fairly excited about it as its relatively rust free, But thats not what I am writing to you guys about.
I have a complete running 392 in my New Yorker but again not what I come to you about today.
I come to you today to inquire about The Saratoga it came with a complete 351 Spitfire which turns over freely and I am sure will and does run and from what I understand is a very powerful engine all on its own at over 300 hp but I have been told I can put a set of 392 Hemi Heads on it is this true?
And if it is True What am I looking at to do such a conversion? what Kind of power could it make built correctly?
Being that I am a Mechanic by trade I am assuming a great many things as I have NO experience with Old Hemis other than the one original that I currently own but never fooled with really.
I am assuming I would need a complete set of heads from a 392 with rocker arms and Push rods tubes and tins What size push rods would I need? would the same length as a 392 work?
Will 392 lifters work in this Block? flat tappet and or roller?
I am also Assuming a Piston change would be required to get any real hp out of this combination does hot heads sell these or do I have to call a custom piston mfg? J&E, Probe or the like ?
Which brings up the availability of after market cranks and rods? can I just contact Eagle or Scat for cranks and Rods? Will the 392 Crank and rods work in this block? and how much can the 354 Spitfire be bored out?
And in the end what cams can I run, will a 392 cam work in the 354 block? and will I need a different Timing cover? and what about a Timing chain? I am assuming since it accepts 392 heads I can use the 392 valve covers But what about a Intake manifold will a 392 Intake work on such a combination?
Then I cant help but to wonder about the better flowing 354 heads do these just bolt on as well???
Is a special Intake manifold required?
To me all this sounds Like I could purchase an already built 392 and have fun or If I could find a damaged 392 I could save big time building a cool engine for a hot rod.
I have been kicking the idea around about purchasing one of the Rolling car Kits available from American Gasser to build a old school hot rod and thought this combo might save me some bucks But It could also cost me twice as much as well if not done properly or I get in a hurry.
i am not looking to set the world on fire or set any track records Just wanna do some burn outs and look cool doing it. If I had to set a hp goal it would be 500-600 hp neighbor hood.
Thanks in advance for any all advice