Will a GEN III Hemi fit into a 71 Demon engine bay? Will stock suspension work?

1970 Duster with a 5.7 Hemi and a 545RFE transmission. Extensively modified k frame, extensively modified tunnel and a strategically placed firewall relief. Has column shift and bucket seats. Torsion bars are 340 and 8 1/4 3.55 rear end.20211211_105916.jpg 20211211_105349.jpg 20210908_113358.jpg 20210901_181456.jpg

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