OldSchoolMuscle71

Yeah I'm in Cali lol

deltaskelta

Can anyone tell me wats the biggest easiest engine to swap with the stock 307 that my 85. 88 royale brougham has now. So i know the 350 olds is a decent engine but I'm lookin to go as big as I can without having to change to much and I would also like to know what trans cam be fitted to the 350 or 403,455.... I have the 200 4r w/overdrive. If you could help n this matter it would be greatly appreciated. Feel free to check out my project n tell me what u think

olds 307 and 403

403 is a direct swap. Minor issues with the 455.

deltaskelta

Does it matter what year car the 403 block comes out of

olds 307 and 403

No, all the same 77-79. Just bolt your all your 307 accessories and go. A non CCC carb and vacuum advance hei might work better than the stock computer controlled carb and distributor.

deltaskelta

Ok awsome cause I just picked up a 79 block earlier today now its time to go shopin for all the innerdes and get it ready for the rebuild thanks for the help