Would an old stock 351w have more power?

[Skyman]

You will need a new lower intake, MASS AIR, new fly wheel, new distributor, new oil pan, and new headers. Those are the main and expensive ingredients. Your 5.0 seems to be making pretty good power.

Also converting that 351 to roller is going to cost you about $400.

Skyler

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-1989 Saleen Mustang #406-
TFS Heads, Edelbrock intake, E-303, 3.73's, 1 5/8 shortys, Offroad-H, 2chamber flows, 36psi FPR, 15degrees timing, 70mm tb, 73mm maf, 24lb inj, Crank pulley, MSD6A, Alum driveshaft, ripper shifter, and turndowns.
13.2@106mph

Daily Driver
STOCK-1994 Integra LS
15.48@91mph